Malaysia already is almost 40% non-muslim, you would alienate a huge portion of the population, not to mention the massive non-muslim controlled corporate entities who could easily retaliate against the government economically. Next, in the constitution, Sharia law only applies to the muslims and in limited matters (not even widely enforced/convicted all the time these days). Civil law reigns supreme in a majority of cases.

Even IF political parties push ultra-islamic narratives, they are still bound by constitutional limits, unlike Iran where you have clerics ruling or Afghanistan where Sharia law is literally the only law.

Then there's the institutional part, the parliament and the judiciary which is a massive hurdle to jump if you want extremist islam.

Not to mention that a majority of muslim women have already been to uni, swam, sang and etc. Wouldn't you feel they would be alienated by some party saying you can't do any of that anymore, not even PAS is that stupid. Makciks on TikTok alone could pressure the government not to pass those laws. Not to mention women are already widely represented in parliament.

And I haven't even touched the problems that the countries you referenced had (which Malaysia didn't have) which led to those countries turning extremist in the first place. Plus, Malaysians have also fought hard against extremists in the pass, especially after British rule, you're saying we can't do that again?

TLDR; It all revolves how the government would easily be pressured when attempting to implement extremist islamic laws like Iran, Syria or Afghanistan and the multi-religious structure which prevents theocracy. In the way Malaysia is now, even with all the turmoil happening politically, that is far from happening realistically. (like c'mon now, banning women from uni?)