I'm planning to visit Malaysia pretty soon from Singapore. I have two options to take private bus from Singapore to JB or fly from Singapore to KL.

I wanted to try to clarify a few things. I believe there are different requirements for going by land to JB as opposed to flying into Malaysia? What are all the differences? Which is easier? I think crossing by bus to JB, I don't need a test (since vaccinated) and don't need an onward ticket? and also don't need travel insurance? Is that right? Or maybe I'm confused.

I made an attempt to register with Malaysia's COVID app (My-something) a week ago.. and I have still not received any registration confirmation or anything. I know a lot of people here were experiencing delays.. but I don't understand what I'm supposed to do next. Is there a web site to register on instead? Or does it need to be through that stupid, broken app?

I just wanted to also ask about visiting Borneo. Borneo has been on my list of places to visit for a long time. I was thinking to visit.. just curious about any latest updates on the situation in Malaysian Borneo. I take it Brunei still isn't open and no news on that either? Ideally, I'd want to visit JB or KL.. then fly to Malaysian Borneo.. still not sure what would be the best place to fly into to experience rainforest adventures. I guess Kota Kinabalu.. Ideally, I'd like to travel to Philippines from there. It's ironic how close KK is to Mindanao, Philippines but yet there doesn't seem to be any flight options to Mindanao. Or at least I can't seem to find any. If Brunei were open.. I remember from searching in the past that there were direct connections between Brunei and Manila and Davao. I guess assuming Brunei is closed indefinitely there wouldn't be any options to do the trip I'd like to do.