One of the reasons for picking Phonaks to replace my oldish hearing aids (HAs)were the absolutely raving reviews on their Bluetooth (BT) capabilities. And I have not been disappointed with my Audéo P90Rs. They switch effortlessly between my phone and TV BT sources. What is really great is that they also still amplify ambient sound, so you are not a zombie when, e.g., listening to your podcasts in the street. And when there is too much ambient noise (traffic), the HA buttons will quickly rebalance the sources. Need to talk to someone? Just tap your ear, and the podcast stops. You can also use BT to listen to music, but HAs do not reproduce basses (pop) well. To do this, I prefer dedicated earbuds (Soundcore Anker Liberty Air 2 are pretty loud, esp. when pushing up all freqs in the app), or use headphones. Incidentally, you can increase the volume of all your mp3 files batchwise using Mp3gain freeware, using a target of 94 db or so. Or/and get an mp3 player that allows bypassing EU volume controls, such as a SanDisc Clip with US/World firmware.
At home I use BT to listen to TV (AND still be able to talk to others). The slight problem here is that Phonak still uses an oldish BT version 4.2, when all modern stuff (our BT-connected TV speakers) use version 5.x. So you hear a horrible, unbearable echo. You can buy a Phonak TV connector, which has great reviews and appears to have less delay, but it is really expensive, and you cannot control the lag. So what I am using is two separate BT sources, with one of them having the sound delayed using a LINDY Lip Sync Corrector. This only allows stepwise control (50 ms) but it does solve the problem at lower cost.