Telus uses two boxes the arris and technicolor. You have the latest Technicolor one.
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Most devices do not have HDMI 2.1 yet. For regular TV set top boxes, 2.1 would be overkill. The Technicolor UIW8001 was released before the HDMI 2.1 standard was finalized. The UIW8001 would have HDMI 2.0. The manual doesn't mention HDR so I suspect it's basic HDMI 2.0. HDMI 2.0 and the UIW8001 still support up to 4K/60fps.
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