You need to look at the specs from the hearing aids manufacturers. Phonaks spells out that their hearing aids are Bluetooth 4.2 so they will work with all computers.
https://product-support.phonak.com/s/article/Bluetooth-compatibility?language=en_US
Whereas your hearing aids manual doesn't mention specific Bluetooth versions and bluetooth profiles at all. The manual only tells you bluetooth with iphone.
You are talking multiple and different things. Let me clarify it for you further.
- Hearing Aids manufacturers want to make more money. So they each create their own proprietary wireless protocol that are incompatible with each other. And you need to buy their accessory clip.
- You CANNOT standardize things when hearing aids companies don't want to.
- iPhone and Android phones are mandated by the FCC to be hearing aids compatible. So Apple created "Made for iPhone" wireless protocol and Google created ASHA (Audio Streaming for Hearing Aids) protocol for android phones so that hearing aids companies can link their devices to the cell phones. Again both sides are mandated by the FCC to work nicely with each other.
- Computers use wifi and bluetooth --- they are unlicensed spectrum. Anyone can use these radio frequencies. So they are not mandated by the FCC compatibility law.
- Windows 11 has Bluetooth 5.3 low energy.
- If you bought a computer 3 years ago with comes with Bluetooth 5.1 chip, then no amount of Windows OS update is going to change the fact that you don't have Bluetooth 5.3 low energy. So you need to buy a brand new computer that has a bluetooth chip that has Bluetooth 5.3 low energy or you need to buy a brand new Bluetooth 5.3 dongle.
- You need to buy a brand new 2024 hearing aid model that specifically tells you that it comes with Bluetooth 5.3 low energy.
- Competition (from FDA allowing non-medical dispensers selling hearing aids) and new competitors that come from consumer electronics (instead of traditional hearing aids manufacturers) will eventually force the hearing aids manufacturers to adopt the actual bluetooth 5.3 standard.