Maybe @1Bluejay could share some knowledge. She seems to get new aids every 5 minutes 
OK wiseacre, not every 5 minutes. More like every 5 days, okay? 
All jesting aside, I got my Marvels in 2019, and in the past year, bought 2 pairs of Phonak Lumity Life aids cuz I wanted an identical pair as backup for once in my life - instead of older ones going down the food chain.
But as for TV Connectors, these devices work for everything from Phonak Audeo B-Direct (which I used it with from 2016-19), to the Phonak Marvel and now even the new Lumity Life aids I have. That is FABULOUS for me, as I can even travel with the TV Connector as needed, if I’m going to need to hook it up to someone else’s TV.