Hello @kks1977, Welcome to Connect. I know it has to be difficult struggling to find answers when you have multiple conditions. I recently had iron deficiency discovered prior to hernia surgery and had to have multiple iron infusions to bring my levels up to normal before having surgery. There is another discussion where members have shared what's helped them here:
-- Iron Deficiency- absorption: https://connect.mayoclinic.org/discussion/iron-deficiency-absorption/.

While we wait for other members with experience to respond, you might find the following articles helpful:
-- Celiac Disease and Anemia: https://gluten.org/2019/10/17/celiac-disease-and-anemia/
-- Persistent Iron Deficiency Anemia in Patients with Celiac Disease Despite a Gluten-Free Diet:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7468819/.
-- Why Anemia and Celiac Disease Are Often Found Together:
https://www.verywellhealth.com/anemia-and-celiac-disease-563116.
Have you talked with your doctor or a dietician to see if they may have some suggestions to help with increasing your iron levels?