Re: Remaking an emulator
It really wouldn't be worth the effort to do something like that right now. High-end gaming PCs have only just started to become capable of running heavy PS3 games at good framerates and many games are either unplayable or having major issues even with that hardware.
Like EmptyEnvelope2 said, buying your own PC or PS3 system would be the best option here. You can get a used PS3 for cheap these days and almost all the models available can be soft-modded. PCs are frankly too expensive at the moment if you just want to play PS3 games though.
This is not the most appropriate place to ask for this. Most emulator creators are not associated with this site, and they are typically against using ROMS obtained through the internet (both for legal and moral reasons).
Right now, there only exists one or two PS3 emulators, the most popular being RPCS3. You could technically ask someone from these projects to port/compile the emulator for android, but there wouldn't be much interest since emulating PS3 requires somewhat powerful CPU and GPU, which few (if any) phones will have. You could also port an emulator yourself since RPCS3 is open source, thought you'd need extensive C/C++ and Java/Kotlin/Flutter/etc knowledge to do so (It is indeed hard to do so).
Your best option, apart from buying/using a PC to emulate, would be to buy a second hand PS3 system.