If you know about DLNA settings for HS-210

Nice to meet you.
I have been using this as a NAS for network audio for many years, but after reconfiguring it due to necessity, I can no longer find the “Media Streaming Add-on” app, and the DLNA server is unavailable. Upon inquiry, I was told that, for security reasons, it has been removed from the distribution servers (such as App Center) and is no longer available.
I apologize for asking about an old model, but if you know how to set up a DLNA server on this device (HS-210, QTS version 4.3.3), could you please let me know?
Thank you in advance.