@youronlyone
A lot of that explanation for the name is retroactive backformation. I certainly have grown up with the narrative that Malaysia is meant to be a name that represents the four (now three) territories but it's like our official explanation for the national flag makes no reference to it being inspired by the US flag 😂
But Munkao's question is more to do what's going on in the Philippines itself, not the various regional groupings like Maphilindo. One Filipino episode of the whole naming issue that's been getting recent coverage is this one lol: https://www.esquiremag.ph/long-reads/features/philippines-almost-renamed-malaysia-a00289-20220601-lfrm
ETA: but also it's not so much that Malaya kicked out Singapore. The funniest way I'll describe it is tht it was a badly calculated game of chicken for the Malaya side of Malaysia, and badly calculated because based on recently made-public papers, PAP was ready to take Singapore out, as they could see their federal prospects to take KL diminished.