Color by Taxonomy Term does not work when the field is using a relationship / entity ference

I can confirm this issue is still present on 3.0.2+1-dev.

Still present on 3.0.3.

More explicit steps to reproduce:

1) create another content/storage/etc bundle with a taxonomy field (B)
2) have an entity reference field from the original (A) that references that type (B)
3) Add that entity reference field as a relationship in a fullcalendar view for entity type A
4) Add the taxo field on entity B and confirm that it shows up correctly
5) Under view settings select the taxo field and vocab etc
6) Change colors on the terms that populate
7) Notice that colors are not passed to the calendar

Used a taxo field on entity A works fine and colors are passed, but using a taxo field on entity B on a view for entity A does not work.

I took stab at LLMing this and didn't get anything that fixed it, but Claude came up with the following areas that may or may not be worth focusing on:

$entity->hasField() check that was preventing relationship fields from being processed. $this->view->style_plugin->getField() handles relationships automatically and could be a good way to replace it. The getField() method returns the processed field output for the current row, which includes values from related entities.