Photof*** has a 'Generate' feature, that is used to auto-export layers or groups. Meaning, whenever stuff is changed there, e.g. inside a group or smart object, it notices the change and updates the exported files. No clicking around, no repetitive manual steps that you have to do again and again (we all know how creative work goes, you make changes all the time and try out stuff). Define what should be exported how and it happens automatically from there.
This feature is extremely usefull and I use it all the time. But if you look at it more closely, it's actually implemented sh**** like almost anything in Photof***. E.g. its very inconvenient to adjust parameters for these exports. There should be a gui for that. Using the name of the layer is obviously a brain-dead idea. Also, it's not possible to specify where these exported files are supposed to go. They are put in an asset folder automatically and then have to be moved manually to where you want them everytime.
Still, it saves a lot of time. Hope this will be added to Affinity, maybe even thought through to the end ...