Contact feedback@tapas.io, because there has been a bug where people's series aren't appearing in search on the mobile app. As of right now, I can find mature comics on the app by typing in their exact names, My Pet Succubus and my own series Heavy Horns for example. Perhaps even @michaelson can have a look at Lujoso Park if he's not too busy with everything else.
Also, I've been running on page format ever since I started in 2015 and I've been doing fine. It's true lots of mobile readers prefer scrolling format, as that what they've been accustomed to thanks to Korean webtoons that have set the standard for webcomic the past few years.
While it's pretty hard to get seen nowadays through popular and trending (and yes Tapas still has to tweak those algorithms to something like before the March revamp), creators still need to do their own promoting.
You ought to start by doing some self-promo in appropriate threads here on the forums, I know people here eat up unique stuff and like to promote each other's work if you are engaged. I think your series is actually pretty nice! The art is really polished and unique!
EDIT: (gonna add my reply to your comment in the other thread)
I'd like to note that you've only started posting Lujoso Park Jan 2019 with long breaks between 5 updates. Even before the site revamp you would still have to post more frequently than that (in smaller chunks) to make the most out of the Fresh section and trending algorithms. I replied to the thread you started.
But I find it difficult to accept your complaints when there's no real basis of your performance numbers if your updates aren't at the very least on a monthly basis.
The internet moves fast, there are thousands of titles on Tap with hundreds updating every day, if you're only posting every few months, it's not that hard to see why your series isn't growing as much as you'd like. Actually 700+ subs is pretty good! Of course things could always be better, but you've got more than some other creators can boast.
(for the record, again, I think your series is neat! It's got great art. But the webcomic game is very nuanced and you have to understand the market.)