I’d say it’s likely that no Smart Hub would natively support it. There’s just too many 433Mhz devices out there to keep up.
Presuming they are all coded with the same your best bet is to buy a remote control and then learn the codes from it.
Unfortunately Homey cannot learn RF codes even though it has the actual physical RF hardware to be able to do it. Athom for some reason just won’t enable this capability I won’t go into detail on it as many on this forum are probably bored of my “ranting” on about it but if you read enough threads over the last 5 years you’ll find out what the deal is about this.
To get around your particular issue I’d recommend you buy a remote (as I mentioned before) and also buy a Broadlink RF/IR bridge.
Connect the Broadlink to your Homey. Then get it to learn your remote control. From there you can get it to transmit and receive signals to your curtain controller.
Yup… , The Homey you purchased has a 433Mhz transmitter/receiver in it but you will have to do this instead I’m afraid…