Sounds like you’re most of the way there. They’ve got an FAQ linked at the top of the page, which should get you the rest.

https://github.com/brianshea2/meshmap.net?tab=readme-ov-file#how-do-i-get-my-node-on-the-map

I’ll also take a guess at what’s left. You’ll want uplink enabled on your primary channel. OK to MQTT in LoRa settings, and MQTT enabled in in MQTT settings. I think you also need Map Reporting set there but can’t recall for sure and the FAQ isn’t clear on that one.

Re: nodes on meshmap. Since the post is 6 days oid, so you might’ve already learned this. Meshmap shows GPS enabled devices that are both able and are configured to share their location over MQTT to the default server. Which, in my personal experience is a pretty small percentage. About 10% I’d guess. So might be closer ones your area.

I was just explaining the cause of the fuzzy position, but sounds like you’ve already got your head wrapped around that.

Agreed, I imagine most people (myself included) don’t want their exact location sent over a public channel.

That fuzziness is probably the default behavior.

In Radio Config > Channels > Channel 0 (LongFast, probably) there’s options for position enabled which will report a general area within a radius(?) of the slider a bit further below. There’s also a toggle for precise location which does what it says on the tin. But everyone with the same radio settings and channel 0 settings (likely almost every other meshtastic node in the area) will also receive your precise location, as I understand it.

My kneejerk thought is perhaps fixed position is set for some reason?

Would be Radio config > position > use fixed position if so.