Yes, I have seen other posts were they installed different vent covers that they can close off or limit the air flow.
Search on Amazon first for registers that look like your but are adjustable.
Let us know what you find out.
Also check to make sure the heat ducts are fully attached. When I opened up that comparment up on my RV I saw 3 small ducts in the front and I think one or two others on the sides.
One of the small duct was just lying on the floor so it had zero air flow. Perhaps your is not attached properly?
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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