I have tried to store the contents of the spray in a container, but it doesn't seem to subside after several iterations. Is the gas intentionally made to dissolve strongly? Also, does this gas have any effect other than spray pressure?

Regarding the spray, the can capacity is 420ml, but the undiluted content is 170ml (indicated on the side of the spray).
Also, the oil used in the spray and the undiluted oil is 100% the same product, but the spray is sprayed by LPG gas, so the liquid is also contaminated with gas.
Therefore, it may take a few days for the LPG gas to volatilize before it becomes undiluted.
LPG gas itself does not have any particular purpose to affect the performance.