In the likes of ON1 were is a filter that has the effect of adding a sort of sunlight glow to an image, it just lifts an image taken on a grey day that little bit to give it some “pop” when there probably was not any in the real world. Is this achievable in PL2 or is round tripping to Nik or some other plugin required. Round tripping from PL is easy of course but if it can be done “in-house” it would be good to know how.
I have not seen anything like that in either PL2 or Nik, but have seen the effect you describe in both ON1 and Luminar and there may be something like that in the Topaz Collection or in Topaz Studio, I am not sure.
You could use any external app that can provide that effect by using the Export To application functionality in PL2 and then saving the image back to your folder.
Besides ON1, I believe Affinity and perhaps others have similar types of added filter effects. While effects can be occasionally useful and fun things, I personally prefer software that gets the best from the original raw image rather than adding things that weren’t there. But I certainly understand their appeal and usefulness.