I came across the Power Retouch Plugin Suite recently. It is available for both Windows and Mac. The price seems fairly high, around $60 or £64 (inc VAT) for a single module or $299 for the set of 27 modules (Windows only).
The Demo full suite installs in Affinity Photo with no problems. Those modules I have tried work OK, although once or twice an error message popped up, then disappeared. The Suite includes Colour fringe removal, Chromatic Aberration removal, Brightness and Contrast adjustments, Sharpness Editor (including halo suppression), Film grain, Softness, Lens correction etc.
Those I tried worked, though I do not think that they could do anything that the current Affinity Photo could not do as an Adjustment or a Filter. Neither did they do better than my Nik or Topaz plugins. The Demo version modules do leave a visible watermark.
The plus is that they all seem to work with Photo.
John