Recent entries lost

I recently restarted my computer at work after 2 months of homeoffice. I had to realize that all entries/data were missing from 2020 and a bit before. Up to March 19 everything is fine. I already tried to exchange the Documents to the most recent (20200313) one from my time machine backup. No change. What can I do else to get my entries from 2020 back?
Thanks in advance,