They tried to get one of the newer ones with the digital display eyes to do it but the CPU of those is one of those nasty Sunplus ones that are real uncharted territory with their u'nSP instruction set.
https://devpost.com/software/doomfurb
The CPUs are definitely weird, and I ended up porting Ghidra to support u'nSP as part of that project. https://github.com/SamuelWAnderson45/sleigh-unsp Reverse engineering a CPU was a wildly fun learning experience; still proud of that project.
I have also been looking into the newer GeneralPlus GPM4x30 SoCs used by some modern Chinese plug-and-plays with HDMI output, at least by the ones that aren't straight up Famiclones hardwired to a composite to HDMI upscaler. Those are ARM based so much less of a pain to reverse engineer but also much less fun...