Yes, I do know that Lazarus and Jairus’ daughter both died later, although Scripture doesn’t actually say so.
The message of these miracles is that Jesus is God and can raise the dead.
Remember that when He raised Lazarus, He specifically speaks of the resurrection, He says “I am the resurrection and the life, He who believes in me, though he die, yet shall he live.”
Again, it is not contradictory to Scripture to believe that Mary is with her Son at His will.
Believe in those myths as you want.