I'm a Malaysian who is migrating to Singapore. Are the investment plans in SG better than Malaysia's plans? Since I'm not from here and I don't have CPF, what other alternatives should I opt for?

Depending on various restrictions, funding requirements, and tax implications, brokerages will have different arrangements to be fulfilled to open an account for non-local residents. However, brokerage accounts and investment plans are not restricted to only Singaporeans.

I like how you use the word "migrating"

You have a few too many options at your disposal.

Get a cheap, but massively huge piece of land in MY not far from civilization, and you can build your retirement house there, about 5 years before you expect to retire.

Oh, and keep earning in SGD as long as the exchange rate permits it.

Life is good.

Cheap u.s. based broker, then the following general style possible https://seedly.sg/questions/what-is-your-genera...

As a Malaysian citizen, you are eligible to put money into the EPF, which is malaysia's version of CPF. You can also consider opening an SRS account and contribute money into it regularly so that you can get tax relief, and used said monies for investment purposes- Stashaway can be invested via SRS. Also, MoneyOwl and Endowus who carry the excellent Dimensional Funds are working to become SRS certified!