That still leaves you with an active wiretap on all of your conversations.

To clarify, are you looking for where to get a pihole or where to get the LG rules?

Pihole is essentially a dns server that routes junk you dont want to nothing so that ads or trackers cant phone home. You can run it on any computer, but then need to make sure your router or devices are using it as a dns server.

The rules for blocking can be found in lots of places, everyone has their own lists. Im not familiar with lg specific rules but there are probably hardware telemetry lists out there if you search pihole lg block list

there is no pihole device, it is just a software you run on linux. you can run it on any kind of computer, desktop, laptop, raspberry or a cheaper SBC, even on old smartphones (but, due to it needing to bind to a port lower than 1000 the phone needs to be rooted first), even on your home rputer if it can run openwrt. but you likely want to have it on something that does not consume much power, because this will be running 24/7

I just tweaked the original post to include 2 lists that I found and that I will try later