E2E Automated Test in BC

I’m a QA tester who is performing E2E tests in BC. I have experience in automated tests with Cypress, but I am completely new in BC. I need some advises on: Is it worth to do E2E automated tests for BC? If so, which tool to use?
I am still onboarding in BC, so as far I can see, as it is a huge application, maybe I should only perform manual tests based on the current release? I think design Test Cases for BC will be an enormous work.