Conditions of walee

Asalamu alaykum I hope your well, I asked a few questions pertaining to my nikkah from yourselves and they have all been answered and removed a lot of waswas and things that were playing in my mind so I would like to thank you very much. I have one last questions to remove all doubts and it’s regarding the my father in law who acted on my wife’s behalf in the nikkah with the imam conducting the nikkah. My father in law although he is a Muslim is not practicing, he’s a really nice guy and he knows he can be a better Muslim by praying and do more for deen. He doesn’t really pray as a Muslim Should but he doesn’t deny the prayer and knows he should be praying. I just wanted to know every other thing that was required to make the nikkah permissible was carried out. My father law not being as practicing , does that make the marriage invalid as he acted in my wife’s behalf. JazakAllahu khairan.