I have three electrical panels in the house and with each one, one of the face screws is under the cover as seen in the picture. So it's clearly intentional. What's the purpose of it?
If I am seeing your photos right, it's a mild security feature. When I worked in electrical contracting, that was done so that a panel could have a lock installed on the door, and then (theoretically) prevent unauthorized access by surreptitiously removing the panel front.
Like most locks, they are meant to deter rather than completely prevent access. If someone wants to get in, they will, but the unauthorized access will take some effort and will be detected.
That's pretty "screwy" looking, lol. Ok that's a bad joke... It appears to not be for a latch, but without inspecting it myself, who knows ? Looks more like a screw that was left in the panel frame prior to the cover needing to go back on...
Most latch acres I've seen are not near the outside edges of the panel cover, but much rather closer towards the opening of the panel cover.
These type of are made for more commercial / industrial type of applications, as the breakers are held in place by screws to their related buss.