How to switch from headless to native Shopify?

Hello,

Our client has a headless storefront and would like to switch back over to a native Shopify theme.

I’m not very familiar with headless so I just want to make sure we don’t screw up anything.

What is the best way to do this?

I see we have two sales channels, “Hydrogen” and “Headless”. Is it safe to simply uninstall these?

When we do so, does Shopify just go back to the current theme?

If something goes wrong, and we need to go back on headless - is there an easy way to do so?

TIA!