I think you have to be selfish about this and think only about you, the impact on you short and long term. It could become very complex very quickly and long term the potential for things to go wrong for you, in terms of your involvement, future relationships, your decision to have your ‘own’ kids with your partner etc. on top of that there is the potential for psychological issues for you, them and maybe the child ( unlikely).
Likewise I’d be very flattered and overwhelmed and the thought of ‘gifting’ someone something like that would be incredible, but personally it is not the sort of complication I would want in my life.
Good luck with your decision, whatever it may be.