I have faux butcher block counter tops what can I do to upgrade them,

You can paint them, put a concrete top over them, or a new countertop over them. The least expensive is to sand, prime and paint.

If they are the squared edge kind, you can remove the laminate and replace. It is sold in sheets at big box stores. You patch any places needed after removal. Glue down the new laminate and clamp in place until dry.

You can replace them with real wood butcher block from Menards or Ikea. Both sell nice options that are very affordable. I also love this solution using doors! https://snapguide.com/guides/turn-a-slab-door-into-a-beautiful-countertop/

If it’s faux, is it plastic laminate (like Formica?)

Here are several opinions. I went with Granite, and I love it!

https://www.youtube.com/results?search_query=different+types+of+countertops

Rustoleum, Daich, or Giani countertop paint kits.

We used. Daich. Extremely easy to use. Ours was applied 10 months ago and seems bulletproof.