Unable to obtain Px in LengthUnit

[CWH0908]

When my style unit is Px, I see that the type returned by LengthUnit is px. How can I distinguish the unit types of Px?

[CWH0908]

Px has been converted to px, and I am unable to distinguish the type of Px during the second packaging process

[ai]

PostCSS doesn’t have LengthUnit. Do you use some other parser?