https://abcnews.go.com/International/wireStory/malaysias-mahathir-97-run-general-elections-91320556
"Malaysia's Mahathir, 97, to run in general elections"
Mahathir who before said he would not run again will indeed run. He will be running on the GTA alliance, including his PEJUANG party (pro-Mahathir PPBM splinter) and extreme Malay nationalist Ibrahim Ali's PUTRA, PAS right-wing splinter BERJASA, and Indian Muslim IMAN. It seems Mahathir this time want to outflank UMNO and PAS on the Malay nationalist and Islamism flank. I doubt it will work.
If he came back as PM for a 3rd time, he'd be the oldest state leader of all time, rather than number 8, where he demoted Queen Elizabeth II, but she eventually ended up in 4th place. He's already number 1 for someone who regularly stood in contested elections.