Hi @ronan.o.ciosoig,
In general you can find quite a few tips to speed up iOS build times in this discussion: iOS Builds slow, any solution to speed it up?
If that wouldn’t help please copy paste the related build’s bitrise.io URL and we’ll look into it! But first I’d suggest you to also try to do the same Archive + Export operations on your own Mac and see how long it takes from Xcode to get all the signed IPAs, knowing it would help a lot! 