While I don't hav any 9mm rifles, they are very popular in IDPA shooting. All of course have pistol mags, usually some sort of Glock magazine. Me, shooting for over 60 years, just never had any lever rifles of any caliber, but recently decided I needed one, so bought a Henry lever Big Boy in 357, and was out at the range yesterday. Like a double barrel shotgun, the short receiver of lever rifles makes them really nice to "handle". I like mine a lot, and I think will be one I often take to the range. I reload for it, so inexpensive to shoot.
Lever rifles are like cars with manual shifters, and bolt action rifles. Something to do other than just pulling a trigger in a semi rifle. But I agree the market for a lever 9mm would much better support a rifle with a tubular magazine. It might be a bit tricky to have reliable feeding and chambering with the short 9mm round. Heck, lots of 1911 pistols in that caliber can be finicky with chambering.
I have "a number of firearms" but non are ugly, like the one in the OP's discussion. SF VET