Plot hole: Vulture was able to re-create his suit despite the tech for it being confiscated when he was arrested. Also, the tech does not exist in the Venomverse, so he would have had no means of accessing it by any stretch of the imagination.
Plot hole: It appeared there was ample time for Milo to apply the so much desired 'cure' that Michael warned him about. Milo is no doctor and did not witness Michael's application procedure. Milo could have never known the precise way to perform the risky procedure, let alone he had assistance from anyone other than Martine.
Plot hole: Vulture from the MCU is pulled into the Venomverse due to the spell cast by Doctor Strange in No Way Home. This is absurd. The first spell pulled characters from other universes into the MCU, while the second spell brought the characters back to their proper universes. Neither of these spells involved pulling characters out of the MCU and into the other universes. Vulture of the MCU was already in his proper universe. No explanation is provided for this.
Plot hole: When Agents Stroud and Rodriguez attempt to arrest Morbius, he evades them by rapidly flying up to the roof from the building's ground floor. Then when Morbius unsuccessfully tries to fly off the roof, Agent Stroud has somehow already made it to the roof to apprehend him, even though Morbius had only been on the roof for a few moments.
Suggested correction: If you look it's been clear that Strange's spell wasn't perfect. Eddie being brought into the MCU when he had no idea who Spider-man was...nor did he die. Electro's new-look and having no idea who Spider-man was. If anything Clea, in MOM basically said he messed up. So that last spell didn't fix things. It's clear this is what they are building towards. Nothing is fixed. Either way it isn't a plot hole for this movie. Post credit scenes are usually teases for other movies to explain.