See https://github.com/plone/Products.CMFPlone/issues/2918
This has been biting me a few times now and I have the experience to override browser views, but this is really beginner unfriendly that we can customise more and more since z3c.jbot 1.1, but not the main_template itself anymore.
Is there anything that can be done to work around the work around that introduced this issue in 2019 (https://github.com/plone/Products.CMFPlone/commit/6de2544b2432b9b0739719eae81b3e1776b217ed)