Generally speaking, a MATX case will have enough room to accommodate an ATX PSU. The form factor is only restrictive when it comes to motherboard size (and in some cases GPU size).
It might be a little tight in the smaller Micro ATX cases, so it makes sense to take some accurate measurements of both the case and the PSU before dedicating to a purchase.
The reason that most Micro ATX cases have room to spare for ATX PSUs is that there really isn’t any such thing as a Micro ATX PSU. Dedicated power supplies were never developed. Your only options are an ATX PSU or an SFX PSU, but the latter is used exclusively for Mini ITX builds.