when you withdraw rewards fee is in ustc. also when you stake the default is in ustc. Same when you swap a token to another.
What gas fees you mean? The equivalent in lunc or something else?
So if it is the equivalent, say
for delegate is 0.179122 USTC
for withdrawing rewards is 1.12066 USTC
for swaping is 0.10819 USTC (+tax)