Lies of P is the only game that really matched up to souls games, but Nioh came pretty close. The Nioh complete edition was free on Epic games a while ago, so check if you ever redeemed it. If you don't own it, it goes on sale for really cheap nowadays.
Nioh 2 is pretty good as well but it's very much more of the same. I didn't get that far in it to tell you which is better.
Avoid Mortal Shell, I thought it wasn't very good.
Salt and Sanctuary is actually really good despite looking kind of mediocre. Expect to get lost a lot, though.
I tried to get into Mortal Shell twice now and both times I've ran away screaming. I hear great things about it, but I find the character feel so cumbersome from the outset that I just give up after an hour or two.
It just plays different. Once you get a bit further than an hour or 4 in, it clicks. Frustrating at first as the difficulty has a technique ramp and some rather hard seeming enemies.
Hellpoint is also a lot of fun.
Lords of the fallen is good, though some of the bosses and ranged enemies are annoying. Need a powerful machine due to the optimization and bugs, daily patches for most of the week.
Darksiders 3 - apparently took a souls-like twist from the rest of the series; may be worthwhile if you can find it on sale (GOG currently has it for $10, ends tomorrow); I'm going to play through the first two before this
Some others that I've played that are kind of similar in some way in case you want to branch out:
Ys Origin - older game, but has a "hard Zelda" feel that reminds me of Dark Souls (almost no emphasis on leveling/skills, more on boss fights and gear progression like older Zelda games); if you like it, check out Cross Code or other Ys games (I've played 1&2, Celceta, and Felghana)
Furi - boss rush
Titan Souls - boss rush where you and the boss have 1HP
Blasphemous - Metroidvania that has a similar dark fantasy setting as Dark Souls
I want to enjoy those games so bad, but I always get so bogged down by the constant new equipment. I find myself spending 50% of the time comparing new equipment to what I already have.
Mortal Shell was pretty good and can be had for less than $5 pretty frequently. It's not as long as a lot of other Soulslikes but has some interesting mechanics.
I personally didn't like it. It's very easy to get lost, there are very few checkpoints, and the gameplay is just a bit too clunky. Maybe the latter two improve later on, but it lost my attention before that.
I really intensely disliked mortal shell. I can tell it's a love letter to dark souls - all the styling is trying very hard - but the gameplay just pisses me off. Especially that first probably-optional boss that you have to parry like 30 times to beat.
You've probably already played it, but I found Hollow Knight to really scratch the souls itch in combat, lore, and general tone. It also has some great metroidvania gameplay
There's a guy on YouTube, Ironpineapple, who has a ton of videos of him playing souls likes of a variety of qualities. You might find something there you like.
I've seen Elden Ring on PC for as low as £30 over the last few weeks if that takes your fancy. I'm also fairly sure it's on sale on PSN and Xbox ATM (at least in the UK).
Wo-Long maybe? It's from the folks that made Nioh and is on Gamepass.
I really liked the way they handled the health system where you first have to hit them with a regular attack to open up wounds and then remove their health by doing a claw attack.
Previous to the souls games were the king's field games of from soft, there's an indie that came out last year (so not much of a patient gamer thing, but it's criminally cheap) called "lunacid". I was skeptic at first but it got me hooked, really fun game.
If you’re still looking for more games to check out, watch Iron Pineapple on YouTube. He’s got a whole series dedicated to lesser known souls-likes. A lot of them are bad but there’s some good stuff in there too. He’s got great criticisms and generally tries to stay positive even with the bad games. Highly recommended