Can my mom claim me as a dependent? I turned 20 in June of 2020 but I was not a full-time student for 5+ months during 2020. She did provide most of my support.

My mom is saying she CAN claim me because she supported me in 2020. When I go to the IRS website it says to be a dependent I need a valid social, to not be claimed by multiple people, and meet all 4 qualifying child tests. I meet 3 of the 4 tests. I don't pass the age test being over 19 and not a full-time student. So while my mom did support me, if I don't meet the age test can she claim me?