JC1991
Returning Member

Employer HSA Contribution from previous year

I was enrolled in an HSA HDPD health insurance plan through my employer in the year 2022. The employer was supposed to credit $1000 to my HSA for completing some qualified medical activities.
I underwent the healthcare activities at the end of the year (Between Oct-Dec 2022) and but the employer was unable to credit the amount in my HSA account in 2022 due to processing delays. I completed the activities in time and was eligible for $1000. 
I enrolled in a PPO (Non HSA) health plan for the year 2023 through my employer. I was told by my employer that since I moved to a Non HSA plan, they can't credit my account with last year's HSA credit of $1000.
Can the employer credit my account (before the tax deadline in April 2023) with the HSA credit from last year that they missed, even though I am not in an HSA plan? If yes, what is the process?