"A country fires a mage after becoming over-reliant on magic they thought was permanent" could be tapped for some worth, especially for comedy, or maybe a more carefully considered kingdom builder.
All this author seems to care about is ticking cliches off a list. Which is a strategy that works. I'd say it's an example of what not to do with an isekai, but at this point we have so many examples of that that it might as well be its own (very lucrative) genre. We out here eating slopsekai.
It feels like nothing happened in 55 pages. The pace is breakneck like it's afraid of losing you, but there's nothing to chew on.
Either it'll get super interesting out of nowhere only to get axed before 20 chapters, or it'll go on for 200 without ever doing anything unique.