New but old

[Dell]

I am a 71 year old man living in the cotswolds uk and have Phonak marvel aids , i have recently changed from Mac to windows 11 although i had windows 10 on my now dead mac and had no trouble connecting my aids to the mac but now with windows 11 on a laptop it keeps dropping out , i have updated to the latest Bluetooth software but i can't check for an update on my aids as the target software was on the now dead Mac so i am hoping that someone has a download link.
Thanks in Advance Dell