I found this one, for example but I don't know the brand.
The only 2240 SSD of a company I know on Amazon Italy is Kingston, but has the wrong screw placements.
ROG Ally owner here - I come in peace. I know many ROG Ally users in r/rogally were reporting they purchased a Sabrent SSD to throw in their Allies (is that the plural?) and I hadn't seen any reports of issues there, for what it's worth.