Theoretically some of our products will partially work in Affinity. You may be able to import our .abr Photoshop brushes however they will not behave as intended.
You're welcome to give it a shot but we are unable to provide support, installation info or refunds for any product used with Affinity Photo or Designer if they don't work.
Furthermore our commercial license does not cover any product converted for use with Affinity.
You're on your own kid. Godspeed!
Any plans for future releases for Affinity?
Coming Fall 2019.