Yes, depending on what preconceptions you have about what it means to "create" a play. Shakespeare did indeed write at least part of all the plays attributed to him. Sometimes he wrote with another playwright as a team, so he did not write all of them alone. And he did not create the plots or stories of his plays. With two exceptions, he borrowed them from books or other plays. That was normal and completely accepted at the time for all playwrights. What mattered was Shakespeare's treatment of the story and the lines he wrote for the actors, not the creation of the story itself.
It is a fair assumption that yes, Shakespeare did do a lot of revision on his plays. The frequent differences between different published versions of the same play in his lifetime tends to confirm this.
Nope
Many stage directions in published plays come from the original production rather than the playwright.
There are 9 stage directions
The Elizabethan theater was used for many of Shakespeare's plays.
All the known Shakespeare plays are printed in books.
Shakespeare's plays were first performed in the early 1590's. They have been performed pretty much continuously since then with the exception of the period 1642 to 1660 when theatre was outlawed in England. (and even then they managed to sneak exerpts on stage as interludes of dance performances). Shakespeare's plays have been performed for over 400 years.
Many stage directions in published plays come from the original production rather than the playwright.
None, obviously. A sonnet is a fourteen-line poem. A Shakespearean play is a drama involving dozens of actors, props and stage directions, taking about three hours to perform. Sometimes sonnets are imbedded in the plays, notably in Romeo and Juliet and Love's Labour's Lost.
There are 9 stage directions
It was unlawful for women to appear on stage in Shakespeare's day. (People couldn't imagine women getting on stage except for some kind of striptease) The women's parts in all plays performed before 1660 in England, whether by Shakespeare or by one of the many other paywrights of the day, were played by boys.
Shakespeare wrote 38 plays.
The Elizabethan theater was used for many of Shakespeare's plays.
There were exactly 63 plays that shakespeare wrote by himself
All the known Shakespeare plays are printed in books.
Shakespeare wrote many plays but these are just two of them. Macbeth and Hamlet.
At least 37 plays.
They are not really unique. There are many many plays by Shakespeare's contemporaries, many of which are better than the worst of Shakespeare's plays. Shakespeare was just one of a large number of people writing plays. But what history has shown is that Shakespeare, when he was on his game, was a far better playwright than any of his contemporaries and anyone else before or since. He was not unique, but he was and is the best.
If you mean, how many of Shakespeare's plays were printed in his lifetime, the answer is nineteen. There were loads of other plays by other authors printed as well, many of them anonymously.