Don’t know about folding pedals but there are a few detachable ones. You screw an adaptor into the crankarm and then remove the pedals when you fold the bike. MKS have a whole range of EZY pedals. The cheapest are resin ones that are fine for round town but I found slippy on a folding MTB and traded up to one of the metal caged ones. SJ Cycles seem to have a fair cross section of the range and they are 40ukp and upwards although occasionally cheaper on ebay. The “cheaper” range need a yellow clip to lock them on, I believe the more expensive ones do not but have no experience.
I also have a pair of Wellgo QRD pedals which are on ebay for about 20ukp and although the system is not as elegant and I needed to play for a bit with pedal washers to get the QR knob in line with the crankarm where it keeps out of the way, they seem to work fine. Again, there are a whole range of different pedals using the system.
MKS also make a folding pedal and judging by their other stuff it will be fine but pricey.
