Anyone else’s toddler being a terrible sleeper all of a sudden? Found any solutions or tips you want to throw my way?

My son is in a toddler bed and has been since 18 months. We have gone through the 18 month and 2 year sleep regressions. When he goes through one it lasts 2 weeks or less. That being said, almost for 2 months now he will not go to bed by himself. He gets up any where between 1-5 times before staying in bed (we just walk him back and don’t say anything then walk out of the room). And then at night he’s been waking up and it takes 2 hours for him to go back to sleep. (Again we are just walking him back to bed and not saying anything)

I have no clue why this started, or if it’s him just sensing baby sister is going to be here soon or what. But I got to have this stop before baby does come. (Not due till December 11) thanks y’all!!!