Looking for games like Hollow Knight.

Sundered is a good one,

Vigil The longest night
steamworld dig 2

those are very good ones

Not a metroidvania like Hollow Knight, but somewhat similar art style and combat:
https://store.steampowered.com/app/1144910/Space_Gladiators/

Some other Metroidvanias that you may enjoy:
https://store.steampowered.com/app/1203630/Record_of_Lodoss_WarDeedlit_in_Wonder_Labyrinth/
https://store.steampowered.com/app/428550/Momodora_Reverie_Under_The_Moonlight/
https://store.steampowered.com/app/692850/Bloodstained_Ritual_of_the_Night/
https://store.steampowered.com/app/764790/The_Messenger/
https://store.steampowered.com/app/332200/Axiom_Verge/

As was noted above, Ori and the Blind Forest (as well as it's sequel) are very likely to scratch that same itch as Hollow Knight. And if you're feeling a little adventurous, I've played Yoku's Island Express and thoroughly enjoyed it. Still that same hand drawn 2D Metroidvania experience, but instead of focusing on combat, it uses pinball mechanics for exploration and area traversal.

Good luck with the art style. Some good metroidvanias though:

https://store.steampowered.com/app/230700/LaMulana/
If you like it, there's a second one out. Less tight platforming/combat, more puzzles spanning not just the entire zone, but multiple zones.

Castlevania: Symphony of the Night. If you haven't played it, you should. There's a reason half the genre name was because of this game.
And a lot less BS than Metroid.

https://store.steampowered.com/app/549260/Alwas_Awakening/
Better than it looks.

https://store.steampowered.com/app/249590/Teslagrad/
Probly the closest in this list to looking like Hollow Knight.

https://store.steampowered.com/app/612390/Dandara_Trials_of_Fear_Edition/
Not bad. Definitely got a unique movement mechanic, which sounds a lot more clunky and terrible than it is.

+1 for The Messenger, Bloodstained, Momodora, and Axiom Verge.
Only played the first Ori, but it just... I dunno. Felt off. It's not bad, just... not as good as could be? The second is supposed to better.

Maybe a bit, tat different. But I'd recommend Stories: The Path of Destinies

https://www.steamgifts.com/discussion/DVctR/metroidvania-games
https://metroidvaniareview.com/

https://store.steampowered.com/app/1147560/Skul_The_Hero_Slayer/
2D platformer that has some similarities to Hollow Knight in terms of style.

Castlevania: Symphony of the Night - bit retro but it defends itself even today
However you can't find it on steam :(

I played first Ori and can definitely recommend it too

Guacamelee
https://www.gog.com/game/guacamelee_super_turbo_championship_edition

Luchadores & Dia de los muertos inspired

Dead Cells