I've got a lineageos phone and I was just scanning my network to find my server and saw it had port 3283 open with the service netassistant. Apparently it's an apple remote desktop reporting thing, but I have barely got any apps installed. The apps I have are:

• newpipe
• osmand+
• neo store
• kde connect

I can rule out kde connect from this because it uses port 1714-1764. It is an official build with no Gapps.