I've heard this called "snapshot testing"
I've used Chromatic before and really enjoyed it: https://www.chromatic.com/features/test
Jest also offers the core functionality if you want to roll your own tests: https://jestjs.io/docs/snapshot-testing
I've used Chromatic before and really enjoyed it: https://www.chromatic.com/features/test
Jest also offers the core functionality if you want to roll your own tests: https://jestjs.io/docs/snapshot-testing
But phrases like "snapshot testing" and "visual regression testing" are what you you/your FE team should be Googling – hopefully there's a tool out there that fits your existing architecture!
Otherwise, as sibling commenters have noted, a policy of screenshots also works.