Whilst you might not want to share this info, we could advise you much more accurately if you gave us an idea of the size of the place you live in currently (sqft), your budget in HK and where you might be looking to live.
I.e. if you're prepared to live 'out in the sticks' (by HK standards) you may well be able to get a village house of 1000+ sqft, but maybe the US$10,000-US$20,000 per month you'd have to spend on rent to have a place with a 'good size kitchen' (by US homes standards) on HK island is less likely.
If you're moving from Manhattan and live in a 800sqft place now, then the adjustment won't be that significant.
On the upside as I'm sure you already know, rents in HK have dropped significantly this year - it's very much a buyers market now. - Drive a hard bargain!
And remember you don't need 'an agent' when flat hunting in HK - Once out of Quarantine, you can visit the area you might want to live and visit the estate agents shops within a few hundred ft radius and see what they have on their books.
As mentioned earlier, tell them you'll only rent through agents who show you very good quality apartments.
Good luck.