I was curious to see whta the options were to read S.M.A.R.T. info from disks, specifically USB disks, and this is what I found:

You can use "wmic" in a DOS box (CMD):

wmic diskdrive

This will pull up a list of your currently attached disks, something like this:

Availability  BytesPerSector  Capabilities  CapabilityDescriptions                 Caption                         CompressionMethod  ConfigManagerErrorCode  ConfigManagerUserConfig  CreationClassName  DefaultBlockSize  Description  DeviceID            ErrorCleared  ErrorDescription  ErrorMethodology  FirmwareRevision  Index  InstallDate  InterfaceType  LastErrorCode  Manufacturer            MaxBlockSize  MaxMediaSize  MediaLoaded  MediaType                 MinBlockSize  Model                           Name                NeedsCleaning  NumberOfMediaSupported  Partitions  PNPDeviceID                                                                    PowerManagementCapabilities  PowerManagementSupported  SCSIBus  SCSILogicalUnit  SCSIPort  SCSITargetId  SectorsPerTrack  SerialNumber                              Signature   Size           Status  StatusInfo  SystemCreationClassName  SystemName  TotalCylinders  TotalHeads  TotalSectors  TotalTracks  TracksPerCylinder
              512             {3, 4}        {"Random Access", "Supports Writing"}  Lexar SSD NM790 2TB                                0                       FALSE                    Win32_DiskDrive                      Disk drive   \\.\PHYSICALDRIVE1                                                    11296             1                   SCSI                          (Standard disk drives)                              TRUE         Fixed hard disk media                   Lexar SSD NM790 2TB             \\.\PHYSICALDRIVE1                                         3           SCSI\DISK&VEN_NVME&PROD_LEXAR_SSD_NM790\5&31F9B997&0&000000                                                                           0        0                1         0             63               0000_0007_2309_2799_CAF2_5BA3_2000_0222.              2048407280640  OK                  Win32_ComputerSystem     ASUSROG16   249038          255         4000795470    63504690     255
              512             {3, 4}        {"Random Access", "Supports Writing"}  Samsung SSD 970 EVO Plus 1TB                       0                       FALSE                    Win32_DiskDrive                      Disk drive   \\.\PHYSICALDRIVE0                                                    2B2QEXM7          0                   SCSI                          (Standard disk drives)                              TRUE         Fixed hard disk media                   Samsung SSD 970 EVO Plus 1TB    \\.\PHYSICALDRIVE0                                         1           SCSI\DISK&VEN_NVME&PROD_SAMSUNG_SSD_970\5&35BCED2&0&000000                                                                            0        0                0         0             63               0025_3891_0A42_0471.                                  1000202273280  OK                  Win32_ComputerSystem     ASUSROG16   121601          255         1953520065    31008255     255
              512             {3, 4}        {"Random Access", "Supports Writing"}  WD My Passport 0830 USB Device                     0                       FALSE                    Win32_DiskDrive                      Disk drive   \\.\PHYSICALDRIVE2                                                    1065              2                   USB                           (Standard disk drives)                              TRUE         External hard disk media                WD My Passport 0830 USB Device  \\.\PHYSICALDRIVE2                                         1           USBSTOR\DISK&VEN_WD&PROD_MY_PASSPORT_0830&REV_1065\575834314136343856585044&0                                                         0        0                0         0             63               WX41B678VYPD                              2217116421  1000169372160  OK                  Win32_ComputerSystem     ASUSROG16   121597          255         1953455805    31007235     255

To the far right, you'll see the column "status" indicating if your disk is "healthy".
The column "InterfaceType" shows what is connected through USB. Please note: SCSI should probably say M2 or PCIe or something like that on my Windows machine.

I did hear about GSMartControl, which is supposed to be helpful as well and available for Windows, Linux and macOS. Just not sure how well it will work under macOS.