@avocadomayo the handle that’s defined is not usable in CTAs or Links. It’s not durable. Links to page extensions use the UUIDs, which aren’t merchant friendly, i.e.
https://shopify.com/{123456789}/account/pages/000a00b0-0000-00cd-0b00-0000000e00f0
vs
https://shopify.com/{123456789}/account/pages/rewards
See the link referenced. How to identify Customer Account Page app extension?