What happens if the GOP gains the presidency, house and senate in 2022/24?

Ok so I’m an observer from Australia and seeing the s*** show currently happening in America is really making me worry what will happen if the GOP gains total power in 2024. Will Abortion be federally banned? Will lgbt rights be thrown down the toilet? Will contraceptives be banned, will gay marriage be overturned? Will the separation of church and state be demolished etc.

Is there hope? Or is America on a down ward spiral to a fascist Christian theocracy?
What happens if the GOP gains the presidency, house and senate in 2022/24?
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