aaah. I know your struggles. I have a dating app :)
At first we would get flagged and it was profoundly frustrating. What we did after was strictly a content marketing strategy with banner ads to download the application in each post and started seeing subscribers and downloads. Have you tried mobile banner ads on targeted apps? Works like a charm.
Very carefully. It may be best to open a couple of FB pages under a couple of other names (daughter, son, cousin, mother, alias, whatever) to begin with as you experiment with this. Steer away from pages that redirect and try to use content and fan pages to build a following. FB is quick to ban these types of accounts. They are merciless.
Best of Luck,
From the Trenches to the Towers Marketing
It is not that difficult to run a dating app advertisement on Facebook, this link will greatly help you: https://en-gb.facebook.com/business/help/143949649021372
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath