Welcome!
You got me curious - I've never made my own compost tea from scratch but I buy a premade organic mix that you add water to and wait at least 24 hours. I've never seen it bubble or foam, but it does smell pretty nasty after sitting for a while!
Anyway I googled compost tea not bubbling and came up with lots of hits.
Bottom line from what I read: Not a big deal. It doesn't need to bubble. Or maybe it did for a while, then stopped, and you missed it. Also, on analysis, bubble or foam does not correlate with an effective, bacterially-active compost tea.