You could try having the PIR activate a Playlist with 2 presets, the first is “turn-on to 30%” which only lasts 0.3s.
That would give the SSR time to come up and then the 2nd piece of the playlist would be the preset you want to activate.
The other thing to look at is the actual SSR you’ve chosen.
I don’t think it’s designed to be driven by a 3.3V MCU, the specs say it needs 5V to activate properly.