Moon's support of the practice resurfaced during a committee hearing on a bill introduced by Moon that would ban gender-affirming care for transgender children. If passed the bill would ban health care providers from performing gender-affirming surgeries on any minor or from prescribing or administering cross-sex hormones or puberty-blocking drugs to a minor for a gender transition, unless such minor was receiving such treatment prior to August 28, 2023.

In debate on the bill, Rep. Meredith cited Moon's stance on child marriage as inconsistent with his aim of protecting children through his bill banning transgender care for minors.

"I've heard you talk about parents' rights to raise their kids how they want. In fact, I just double checked. You voted no on making it illegal for kids to be married to adults at the age of 12. If their parents consented to it, you said actually, that should be the law because it's the parents right and the kids right to decide what's best for them. To be raped by an adult," Meredith said.