Internet explorer is thankfully finally death as Microsoft end developing patches and provide support so we do not need to deal with it anymore.
Cross-browser compatibility is big topic for many years and as CSS in last few years is rapidly evolving in exponential pattern I would like to see how WF will be catching with this trend and implementing these new improvements for “no-code” developers into UI.
The best practice is good knowledge of CSS and permanent cross-browser testing.
I personally test first in Safari, then in Firefox and lastly in Chrome. Then I check site just in case Brave and Edge.