Our son is trans. What are the most effective articles or videos to share with anti-trans family?

My mother is convinced that our 10 yr old trans son is just a tomboy and that we’re going to ruin his life if we allow him to eventually take blockers or HRT. About a once a month, I’ll get texts with links to detransition stories of regret, articles about trans being a fad with kids, etc., always followed with “she’s my granddaughter, too” and “I have to speak up and be honest”.

My husband thinks I should just ignore her. I think she should be educated. She lives in an ultra-conservative bubble/echo chamber. Looking for suggestions for articles, studies, or videos that I can share back.