Having a gender dysphoric child can be a frightening experience. This account will direct parents to various resources where they can get advice that is based on sound science rather than ideology. All of the resources here support the rights of LGBT people.
http://transgendertrend.org is a U.K. site which will provide a good overview of the legal issues in the U.K. and medical information for everyone.
http://4thwavenow.com is a U.S. based site with a wealth of personal stories, research and commentary from parents, detransitioners and professionals.
If you want to dig deeper http://genderhq.org provides a detailed summary of the relevant medical literature. It was created by a group of LGBT people who were concerned about the risks of medical transition of young people.
http://genderreport.ca covers gender health related issues in Canada.
http://ourduty.group is an international network of parents working to protect their children from the consequences of gender ideology.
The Detransition Advocacy Network is a support group for people trying to desist from or reverse a gender transition. http://detransadv.com
The Society for Evidence Based Gender Medicine is an international group of clinicians concerned about the lack of quality evidence for the use of hormones and surgery to treat gender dysphoria in young people. https://segm.org/
Sasha Ayad is a Licensed Professional Counsellor who works with teens. Check out her YouTube channel. https://www.youtube.com/channel/UCGNuXjES0uUGfvXaRwixgag
Also on YouTube The Mess We're In provides a weekly look at the latest news on gender issues. https://www.youtube.com/playlist?list=PLmi-Y3VyghCqy-NO_vZrEz_QbtpxmEJCh
The Boyce of Reason provides full length interviews with everybody who is anybody in the world of gender including medical professionals, researchers, journalists, trans people and detrans people. https://www.youtube.com/c/BenjaminABoyce/featured
Irreversible Damage: The Transgender Craze Seducing Our Daughters by @AbigailShrier is an thoroughly researched introduction to rapid onset gender dsyphoria in teenage girls. https://www.amazon.com/dp/1684510317/ref=cm_sw_r_tw_dp_x_m0KtFb25G5DZ3 via @amazon
Bayswater Support Group is a group for parents of trans-ID children that promotes evidence based care. https://www.bayswatersupport.org.uk/
The Gender Care Consumer Advocacy Network promotes quality medical care for both trans and detrans people. http://gccan.org
Gender ideology relies on misleading statements about the nature of sex. The Paradox Institute sets out the scientific facts in clear and simple videos. https://www.theparadoxinstitute.com/pi.html