There is no such thing as a Norwood 2.5, I’d put you as a Norwood 3a as yout temporal peeks have moved back and your frontal section is thinning with deep recession at the temples, that said you Havnt showed your crown either, also no top surgeon is going to remove your hairs and replace them with donor hairs tats crazy talk man common,
Have you done enough research before you go ahead with your surgery? Please make sure you do because yes you will loose more hair over the years you could also loose some of your native hair after surgery to shock loss which can be permanent, I don’t want you rush into something that your be dissapointed with, if I was you I’d hold off for now and continue of meds to maintain for a while your hair loss is not major atm.
Whoever drew on that hairline has no idea sorry mate it’s too low and has no definition your 29/30 it needs to be higher and rounded looks far to feminine you will be wasting a lot of grafts for future loss going that low