Dimmable LED Downlights flickers on Dimmer Switch when there are more than 5 connected

I have purchased a Smart Dimmer Switch from Moes and Dimmable LED Downlights both from Shopee an online shop on the Philippines. I will include screenshots of the product specifications. Can you please help me what's the remedy so that I can connect more than 5 Downlights without flickering. Also when there are more than 5 connected, I can see that not all flicker, there are 2, 3 or even 4 that's not flickering on less than 100% brightness. And it does flicker when the lights brightness are under 100%. If it's full of 100% the bedroom setup doesn't flicker, but the at 100% on the dining area, it does but not that noticable. On the room, there's ZERO flickering when at full brightness.

House Voltage from main line 240V (actual reading 239V) Actual reading when testing from the Downlights 227V more or less The outlet socket where you can plug appliances is around (230V+++) The lights are connected to 20A breaker The main breaker from the grid is 125A Our house has its own 15kva transformer from the utility pole, exclusive just for us Uhm... What else? The dimmer switch says 250W for LED max capacity. The Dimmable LED Downlights is 9W. Also the Dimmer Switch doesn't have any cut switch or Adjustment at the back. Or that's what I thought.

Please help guys. I also heard that putting capacitor will help? Also I'm not an expert by any way. Thank you