Secrets of Sulphur Springs (imdb)
It's on Disney Plus.
Made for a younger audience, but it's good, running through all the time travel tropes.
Normal Family buys a spooky old hotel next door to an abandoned holiday camp where the dad went as a child. There's a magic basement. The eldest child of the family plus a local girl go back in time to the holiday camp and interact with their parents to their detriment.
Mysteries and paradoxes galore.
Season two just started.