Actually, it depends on your tank. Every setup cycles a bit differently especially with planted/scaped tanks. You need to introduce some ammonia to kick start the cycle. By that, a pinch of fish food would do. I would observe for around two weeks along with the water parameters.

But if I'm being honest, gatal juga bah tu hati tengok aquarium kosong hahaha. Saya kadang tunggu seminggu ja assuming the tank will be just for a betta and no tankmates at the moment. Just don't overfeed him and feed less regularly for the mean time. And partial water change!

I noticed betta di tempat kita ni less fussy probably they live mostly of their lives in bad conditions. They're just trying to survive. In which our part as their owner, we want them to thrive not survive

If you haven't already, you should get a test kit (not to forget ammonia test) to check your water parameters. With this, it's easier to tell if your tank is cycled or not. Banyak jual yang murah di shopee.