Here, I maintain a list of almost every single existing web fiction website on the internet (except for shady/scam ones which I haven't listed for obvious reasons) and you can check them all out if you want. I've only used a few though, so I can't say which are the best.
Of those I've used, here's my quick summaries:
Tapas: You're already on this one
Royal Road: The biggest web fiction site worth posting on; it's very hard to get more than 100-200 views per chapter for stories that don't fit into the popular niche, but you will get significantly more views here than practically anywhere else, and it's a good funnel to big popularity if you get lucky. However, there are a LOT of toxic readers who are extremely rude, so if you get popular you will be facing that.
Scribble Hub: The site functions just fine, but there is a very laissez-faire moderation policy, which results in a lot of stories filled with mature content and, um, objectionable content. The forums are also inhabited by literal self-professed white supremacists who openly advocate for genocide and the moderators basically don't care enough to deal with it. Until that issue is dealt with, I extremely anti-recommend this site.
Wattpad: Don't use this. You'll get no views and you'll just feel worse about yourself. There's no chapter scheduling either, so you can't just upload it all and forget about it.
Creative Novels: I think this site has turned into a translation site mostly, but it does have hosted stories. When I uploaded my retrofuture story there, I uploaded 150 chapters in a month and got less than 100 views total, so unless the readership has changed dramatically, nobody cares about the stories that aren't Chinese-style action novels.
I've heard Moonquill and Neovel are good, but their viewcounts are pretty small even compared to Tapas. I've heard some really shady stuff about Inkitt, but that was from a few years ago so I don't know if it still applies.
