FYI Teams 2.1 and Seamless Apps support from Citrix: Fixes Backporting to 2203 LTSR The following features will be backported to 2203 LTSR CU5 and will be available as an On Demand Hotfix for 2203 LTSR CU4 • Published App Support • Default whitelist of the process msedgewebview2.exe • A bug fix in App sharing Action Needed: Customers who are on 2203 LTSR CU4 and need a hotfix, please raise a support ticket with Citrix so that we can track and roll out On Demand Hotfix as it gets ready.

sweet so finally seamless apps are now supported 🙂 i still see it says that Server 2016 is not supported has anyone got it working on 2016 ?

Nope, time to let 2016 go and get to 2022. The AppX support in 2016 and 2019 is deprecated for the new 2022 version.