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For these cards the giant heatsink is connected to the VRMs so cooling is a non issue. In OP's pictures, he seems to have replaced the heatsink of his card with one from the case without cooling the VRMs.

From personal experience, I tried to silent cool an RX 550 (50 watt vs 75 watt of 1050 ti) without VRM heatsink and the VRM temnperatures were up to 100-103C during a torture test. Adding a fan lowered the temperatures by 20C.

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Both the hi-side and lo-side mosfets (they might be 2in1 on a card like this) are rated for their amperage at 125c and are typically capable of dissipating that through their contact with the pcb. Airflow is nice, but not required. Neither is direct contact with a heatsink. Those are for higher end cards (who also rate their mosfets at 125c for good reasons. Max tCase for mosfets is usually 150c. Beyond that they just die.

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