Peacock app is unusable - slow, slow and slower

Accessing Peacock (and Paramount+) app from my set top box is nearly impossible. It's very, very slow to load and impossible to navigate.

I just recieved an updated and latest box and modem. Have 1.2 gb internet, web speeds are great. But loading any app thru Xfinity is slow. Guide showed a bit of improvement with new box but it's slow as well

Netflix, Disney+, etc thu SmartTV hub is great.

Help!