HG630V2 - Prioritise Devices Connected

Hi, there.

I just joined the community and would appreciate considerate responses and apologies if this should be focused elsewhere.

I am not sure why but my ISP forces this single band gateway on my ADSL connection, which supposedly delivers 30Mbps.

I have an IPTV device (Mag250) as one of my connected devices that regularly falls below the required 5Mbps minimum so I would appreciate any help in configuring the gateway to ensure the IPTV has the highest priority for bandwidth and ideally guarantee that the minimum is 5+Mbps at all times.

Other devices connected include - 2 iPhone and 2 iPad, MacBook, windows laptop, HP printer, and a handful of google home devices, guests devices when they visit (but edited out when they leave) which could all have low priority.

I have access to the admin panel and feel reasonably confident following guidelines to make changes, but obviously, the more simple each step would be good.

Thanks.