@crinrictI also only tried a regular tub.
I just play tested with all the tubs/combos on an empty lot and my child Sim was able to use all of them for bubble baths. So now I'm even more confused lol
Is there anything near it though? It might be the bubble bath animation requires a different space. I was confused when my Sims could take baths or showers in the base game shower/tub combo, but couldn’t bathe the dog - then I realized I had to move the toilet because while they could get in and out fine for normal showers/baths, they insisted on using the very front of the tub (where the toilet partially blocked it) in order to put the dog in. I hadn’t tried a bubble bath or a kid before remodeling to move the toilet.
I have the same issue in my current house.
