Only if both of these conditions are met:
Your individual plan is a High Deductible Health Plan (HDHP)
Your Thatch health budget is structured so it can't reimburse medical expenses until you've spent the statutory minimum deductible out of pocket
Most CHOICE plans allow you to use your health budget for eligible health expenses right away, which makes you ineligible for HSA contributions. Check with your employer or Thatch support to confirm your specific plan's structure.