Resolution issues on attached devices

My current setup is all my equipment connected to denon avr then the hdmi out goes to a rybozen 4k capture card then to the single 2.1 hdmi my tv has my issue is that using the setup this way means my sky q box wont allow me to select uhd resolution only 1080i and my firestick isn't allowing dolby vision and hdr.

Would a splitter sort out the issues im having if so where in the chain do i put it.

It does yes ive ordered the ezcoo splitter but im unsure how i set it up as in which hdmi's go where etc any advice would be much appreciated.

Thank you i should be able to follow that

So I've set the ezcoo up as you suggested and all led's work but although my sky q box now lets me select uhd its only allowing 8 bit but i know my tcl tv supports hdr10+ am i missing something on the ezcoo that would fix this.

Update on trying the sky q again i tried the find it for me and this time it selected 10 bit so all looks good now.

Thanks

I now have no led's working at all but havent changed anything so i think it was my wled that was showing led's earlier not the hyperion im not sure what to try to fix it.