At the moment, it is not possible due to the fact that the Thunkable X’s WebAPI component currently does not send headers nor body (you can set them, but they won’t be sent due to bug or non-implemeneted yet - I’m not sure since I’ve not gotten any response to this problem yet).
But your query regarding patch makes sense; when the WebAPI component does actually get implemented, they should include all the standard WebAPI request types… currently many many are missing.