In terms of specific exercises that can be done with a bosu ball, it looks like you are a certified personal trainer, so it seems likely you are well up on your anatomy and ways to sequence exercises to target various muscles.
The difference with group ex, of course is that you have a lot of different people you need to modify“. not so much that one routine will fit all needs, but that each exercise has to be able to be modified.
I like to use a ladder“ take a base exercise, teach that one, and then do 2 or 3 more sets, each one with a slightly harder variation (how you do that depends on the exercise, sometimes I use a single limb, sometimes double, sometimes add resistance, sometimes add a core component“ I am sure you know the drill“ as people come regularly they know the blocks, or ladders“ and I invite the students as we go up the ladder either to go up a rung, or go down a rung as they need.
I find if you meet people eye to eye, ask before class if there are things they would like you to help them to find modifications for, and invite them to modify harder or easier of for their particular needs that is helpful. Most people are there wanting to like it, and your energy and connection to them is very helpful.
I think where you are is rather hot and humid, yes? Probably also helpful to remind them to hydrate, though you probably do that with your personal training as well.
I hope you enjoy your classes. Group ex can be a lot of fun.