ads are coming thru my iphone13 to my hearing aids

Also, here's a link to an Apple Support article. It covers setting up your phone for use with bluetooth-enabled hearing aids. Perhaps something there might help...

Hearing ads on your hearing aids would certainly be frustrating!

First, to relate your two questions in the Discussions, the other one is here.

Just to be clear, are all sounds from your iPhone 13 coming through your hearing aids, or just the ads?

Next, are your hearing aids somehow bluetooth-enabled?