Why can't I access this Mesa with Immured Fury? No roads/nodes connected to it. What am I missing?

The game took "immured" a bit too literally.  You were just unlucky.

Is there a tower in range where you can use The Grand Project Precurser Tablet? That might/should let you access it.

Some of yall just have the worst luck.

It’s a known bug to have tiles randomly have no access points :( I think another tower with grand precursor will make it accessible.

Whenever i see poe2's endgame atlas i just remember my half assed coding projects where shit looks ok but it only works on like the 80% most common use cases

Have you tried clicking rapidly around the base. Button might be invisible. If not gg