I just upgraded my phone it to the iPhone 16 Pro Max and it’s been extremely slow to type to take any Siri dictation or text always texting the wrong thing even when I’m doing it manually

it’s been extremely slow to type to take any Siri dictation or text always texting the wrong thing even when I’m doing it manually. Also, the AutoCorrect does not work not even the grammar correction or the punctuation when you select it you know the word to check. Why is it underlined for? Correction it does not give you any other options. It’s like always blank and does not have a word that would fix the mistake basically These are just a few things including the speak feature and select selected items is gone. Also, I spent three hours with Apple support trying to figure out why is my text not being typed as soon as I type it and after three hours, I had to like walk away because I everything that was I was being told did not clear that the problem