Audit finds issue with label not being associated with field despite element existing

[socsieng]

Example: https://payments-angular-store.web.app/list/mens_outerwear/Men%2Bs%2BTech%2BShell%2BFull-Zip

The problem in this case is that the id being referred to here (e.g. mat-select-8) is a mat-select custom element.

Question: How should non standard form inputs like this be handled?