As far as Love's Labour's Won, there has been debate whether that is a different play, or just another name for Love's Labour's Lost.
Both are listed in this inventory.
It’s not unlikely that all or most of the Blackfriars Plays were lost, perhaps when the Globe burned down, or in 1666 in the Great Fire of London. Those may have been largely collaborations, and he contributed a page or two for the multi-author “Thomas More”.
The theater company held the approved book copies of the plays, rather than Shakespeare himself, but obviously other copies existed or the First Folio wouldn’t have been possible.
[snip] there is an upstart Crow, beautified with our feathers, that with his Tygers hart wrapt in a Players hyde, supposes he is as well able to bombast out a blanke verse as the best of you: and beeing an absolute Iohannes fac totum is in his owne conceit the onely Shake-scene in a countrey. [/snip] — Robert Greene
(Johannes factotum means something like “Johnny Do-it-All”)
[snip] Soul of the age! The applause, delight, the wonder of our stage! My Shakespeare, rise! I will not lodge thee by Chaucer, or Spenser, or bid Beaumont lie A little further, to make thee a room: Thou art a monument without a tomb, And art alive still while thy book doth live And we have wits to read and praise to give. [/snip] — Ben Jonson