Wendy, I think others like @megg and @jp85 will be interested in what you find out.

This article from Healthline.com compares choices for in home and in-lab testing. Some have tests you can take in your home but send the samples out for analysis. Some products only check for iron or ferritin and don’t give a very accurate result. Read more here:
- The Best At-Home and In-Lab Tests to Check for Iron Deficiency https://www.healthline.com/health/at-home-iron-test#our-picks

Please let us know what you learn.