4 month regression?

I know many of us hear about and dread the 4 month sleep regression. I’ve heard some babies are severely affected and few others not so much. My lo just turned 4 months and for a couple days now has been resisting naps or they’re short and unpredictable unlike usual. She’s been a decent sleeper /napper. Especially last 2 months. Question I have is, have you experienced only nap regression? My lo is still sleeping fine overnight but wondering do all baby have problems with both or one or the other. I’m sure it’s a spectrum but trying to mentally prepare for bad nights too. So far it hasn’t happened but curious of others experiences.