No, you do not need to report Roth IRA contributions on your tax return, even if you turned 18 this year.
However, if you are not claimed as a Dependent by your Mom (or anyone else) and you are not a full-time student, you may qualify for the Savers Credit. This most likely does not apply to you, but I thought I would mention it just in case.
See this TurboTax Help Article for more information: What is the 2023 Saver's Credit?