How can I exit safe mode in Windows 10

I wrongly allowed Safe Mode to engage. How am I able to exit it?

If you somehow meant safe mode of LibreOffice, not that of Windows OS, then just close LibreOffice and start it again…

Not really the right support site for that - but
https://support.microsoft.com/en-us/help/4456067/windows-10-switch-out-of-s-mode

Also, if you want to use S mode (and it isn’t a bad idea) you can find a copy of LibreOffice which works quite nicely there, it is called Vanilla LibreOffice, available from the MS Store, comes from a CIB (a member of the TDF advisor board). It does cost $9.99 but gives you seamless updates under Windows 10 S for 18 months.
Found here: https://www.microsoft.com/en-us/p/libreoffice-vanilla/9npr3bznj4dm?activetab=pivot:overviewtab