Can someone quickly elaborate glucose levels in beta agonists and beta blockers?

Can someone quickly elaborate glucose levels in beta agonists and beta blockers? it seems simple, but confusing as hell to me

Both cause hyperglycemia

Yes, but, could you please elaborate the mechanism behind, vaguely?

Beta 2 agonists causes the release of both insulin and glucagon and also induces glycogenolysis. The net effect of all this is an increase in blood glucose.

Beta blockers reduce insulin release- hence also causes hyperglycemia.