I believe Penn no longer requires the covid vaccine. The policy has been updated.
Since you seem happy and successful at UCLA (a widely respected university) I’d suggest you continue there and apply to Penn for a transfer junior year if you like (as long as you are not in a disciple that only accepts sophomore transfers). Or consider Penn for grad school if applicable.
Unsolicited comment - keep in mind that transferring isn’t always easy. Many friendships are formed freshman year when everyone is new to the school, most students will be in routines while many things will be new for you, you need to see if appropriate housing is guaranteed for transfer students etc. A transfer can be worthwhile in some situations but be sure to understand the potential pitfalls as well. The grass isn’t always greener…
ETA…meant to reply to thread…