Is it possible to catch them all?

Is it now possible to catch them all, including all of the Deltas and stuff?
I found a 2016 topic asking the same question and there were a lot of Pokes that you couldn’t catch, but, since the last release (1.2.3, right?), can I actually catch them all now?

You can catch them all, so long as you download on the discord. It’s a private test patch that fixes the Kyurem encounter. Also be aware of a lot of bugs, such as how getting delta remoraid will break your fishing and lock you out of pokemon such as finneon. You can still trade pokemon for dex completion, and you will be rewarded with a bonus when you decide to catch 'em all.