iPhone receiver Low Volume Problem

Apple iPhone 11 replaced by Apple 3 months ago due to receiver low volume issue is affected by same issue again. The set is just moved out of warranty in October. Apple Support has same response as always to change the receiver that will cost me several 100 dollars. This is not the first time it happened with me. My iPhone 6 also had a same issue and I had to get it fixed twice. This is not an isolated problem. Apple is not telling me the reason and instead always advice to replace. Any ideas please?

Apple taking this issue very lightly.