I sent an email to support:
I am still using (Oxygene) version 22.214.171.1241 with Visual Studio 2013 but want to use a more recent version of Visual Studio. Will that version work with newer versions of Visual Studio or Visual Studio 2022 Community edition?
and got the following answer:
Elements 8 licenses were perpetual, so the current license should work fine for these projects, if you don’t want to upgrade/renew.
I don’t see how to create/add projects or use Oxygene templates in Visual Studio 2022.