Sadly Jawa is dead in Europe with pretty much non existent aftersales support. When it comes to BSA, there was a big hype before the launch and a lot of talk about BSA being back and all that. I've seen the Gold Star at Motorcycle show in Birmingham (UK) and I really liked it even though I've already had bought my Interceptor. I thought it was good for us customer to be able to have a choice and to have a few decent options in that affordable modern retro segment.
BSA launched Gold Star in 2022 and now 2 years later it is still the only bike in their line-up. There is a lot of talk about new models, but so far nothing have been announced.
To be fair Gold Star had a pretty good end of last year (top 10 over 125cc best sellers in the UK) -
https://www.bennetts.co.uk/bikesocial/news-and-views/news/status-uk-motorcycling - with over 600 of them registered in Q3 2023, but I can't stop thinking that if they won't expand their offer their customer base will start shrinking.