storage different :(

im using a macbook air m3 and I got whiskey for it for steam, but the whiskey steam says I only have 81.98gb free, but my laptop says I have 136.98gb free?? is it not syncing or something? the normal steam on my mac says I have 127gb free. I've tried to fix it but everyone says to delete the time machine snapshots, but I dont have time machine enabled. can anyone help? I've always used windows computers and this is new to me, sorry if I'm being dumb!!