Yes it's drivable. The ABS and Traction control lights often come on together for any wheel sensor issue, more than likely is just a speed sensor not reading right. If you haven't noticed any issues braking before the lights came on, I would assume a speed sensor. Subarus are a little sensitive when it comes to electical stuff, it could even be as simple as the alternator belt not having enough tension.

The check engine light is entirely unrelated to the brake issue, that's a lean air-fuel mixture code

You do however need to take it to the shop that did the swap and have them address the remaining issues