Unfortunately there are no monitors sold by any company other than Apple (and LG for that one 5K display they made specifically _for_ apple) that have a “retina” pixel density, which I would define as >200 PPI. (The Studio Display’s is 218.)
Every ginormous “4k2k” or whatever display is just that: ginormous, so the actual pixel density is much lower, and is comparable to a typical (smaller, 1440p, etc) display.
I suspect this is because the fabrication of the LCDs is tuned to a particular pixel size, so if a company wants to make a 4K monitor, they scale existing LCD production up to a large enough size that they can get it 2160 pixels tall (by however wide), and that’s the size of the display. They can advertise having both a large display (which people like) and 4K (which people like), so there’s no downside to the manufacturers.
But if you want actual high pixel density, 200+PPI, your options are basically an Apple monitor (LG’s apple-sold display notwithstanding), or a smartphone.
(I’d love to be proven wrong on this! My holy grail monitor is 200+ppi, 120+Hz, large (27”+), and ideally ultrawide, but alas, such a thing doesn’t exist.)