Mac Repair and Service - Apple Support
Apple's U.S. site shows that they still are offering battery replacement service for the MacBook Air (Retina, 13-inch, 2019), at an estimated cost of $159 USD.
However, you indicated that your Mac had other issues – with the logic board and audio board. I believe that Apple currently considers that MacBook Air to be "Vintage" worldwide, which means that the availability of service might be subject to parts availability.
Obtaining service for your Apple product after an expired warranty - Apple Support
There is also the question of how expensive all of those repairs would be – and whether it would be worth making them, instead of replacing the machine. If you took the machine in for battery replacement service, it is likely that Apple would want to repair the other issues, out of warranty, too.