do one hot when you got time just see difference to ring sealing .
Expect HG likely okay and only issue you got internally is rings far from bedded in yet and fair bit of oil coming through too . were the bores honed and didn't you go with genuine ring set in end ?
Once fuelling, idle and ignition all good/checked and it got MOT you need do some road miles and see what happens.
very minor HG leaks can be hard prove and running cylinder pressures far higher than test pressures, I had subaru ej25s with minor leaks that don't show on gas sniff or chemical and little visual clues either, also not uncommon see coolant level drop on recent filled system so without further evidence I would just monitor closely .