Currently there's no way to look at a specific timeframe in the new report (for example last year), unless I missed it
https://httparchive.org/reports/techreport/tech?tech=Wix&geo=ALL&rank=ALL&page=1&median-lighthouse-over-time=performance
Selecting a date range is a useful feature in the old report (I can't link, since timeframe isn't copied on link), but something like this and choose specific timeframe