I think I may have already answered you via Discord PM, but wanted to follow up here as well:
If you haven't already, make sure to join our Deformers Discord server and set your role to PS4 so you can chat in the PS4 channel (otherwise you'll only be able to see it, but not participate). In the PS4 channel, there may be other PS4 players who are looking to party up, so if you provide your PSN ID and let them know what time you normally play, they can add you and it can help facilitate matchmaking in the meantime.
We have a big update coming very soon, so it's likely we'll see a new influx of players during that time which will make it easier to find matches as well. Stay tuned for more information about that this week!