Struggling to add dimmer to Alexa

Hi, I’m having issues connecting to Alexa and would appreciate some advice…

I have the following:

Smart hub E1
Dimmer H2 EU

I have other devices but they’re all running fine.

I recently bought the dimmer switch and it’s been installed and working fine.

Today I’ve tried to connect it via Alexa. I have other aqara devices (2 X H1’s and the roller shade E1) and they all work fine via Alexa.

I’ve never used Matter, and since I have the hub, I threw away the packaging with the QR code.

Setting up in Alexa, it only offers me Matter. As soon as I click that I don’t have the QR code, it goes no further.

So I added the aqara Alexa skill. It then found a new device, but for some reason, it’s showing up at “simple security system”. And doesn’t respond.

I’m not sure what else to do here… I understand Matter can make things easier, but I have the hub so I shouldn’t need to use Matter?

Anyone have any advice they can give me please?

Tia