have you figured this out? i just had a similar issue - minus the dropdown. i wanted to filter data into multiple repeaters on the same page. it looks like in the console you are passing an object instead of an array.
try let curEvents; instead of let curEvents=;
also console.log everything in here results.filter(item => item.sport === sport); to make sure item.sport really equals sport.
One more thing check out “Store Downloaded Data Instead of Refetching” here
https://support.wix.com/en/article/corvid-improving-performance-in-wix-sites-with-data