I'm a teacher of small children and I hate playing with my own children! When my daughter says 'let's play Barbies' my heart sinks. But I love chatting to them, cuddling them, interacting with them in a way that isn't pretend play. My husband has mastered the art of doing games where he is lying down and the children play doctors or give him a makeover or spa treatment and that keeps them happy but even that annoys me!
I think I'm a good mum with confident, happy, well adjusted children but I do not enjoy pretend play. There are some ways around it. If I feel like I have to do it, I set a time limit but really give my all in the time we play (20 mins).
I try to find other things to do, like colour in beside eachother and chat. We get the connection and they think I'm involved, but I can kins of tune out and I actually quite enjoy it.
I also quite like making stuff so don't mind building blocks with my kids, like duplo, blocks etc.
Having a little picnic on the floor or in a cafe is a nice way to connect together and feels a bit novel.
Ultimately, you don't have to do pretend play with your child all the time. Children should not be entertained all the time as I think being left to their own devices can help promote their own imagination. Your child will get older and develop other interests more independently so this is just a short phase: it will pass! I've seen children whose parent constantly interact, stimulate and entertain them end up being unable to do any othe above by themselves. The most important thing is connection; seeing your child, interacting with them and demonstrating that you like and love them, you enjoy their company amd find them funny amd enjoyable to be around. It doesn't have to be play.
Don't beat yourself up about this!
Ps on a very hard day, I remember sitting on the floor with an ear pod in one ear, listening to a podcast while playing along with one of my kids. It helped!