That's highly, highly unlikely for several reasons.
First, stripping the child of a monarch of their title for weak reason creates a dangerous precedent that Charles and William are desperate to avoid.
Second, stripping Harry and Meghan of their titles to punish them for committing the crime of wanting to work and live their own lives, and whining a bit, while permitting Andrew to keep his (who's also no longer a working royal), is disastrous optics. Removing Harry's title and not Andrew makes Charles look hypocritical.
Third, making a very public display of punishment would cause a scandal that would backfire on Charles at the very time he needs to create the appearance of stability and unity. There's already a lot of criticism for how Harry has been treated in comparison with Andrew. Publicly punishing his own child but not Andrew makes Charles look petty and vindictive. Charles is not well-liked, he's having to replace a beloved Queen, the last thing he wants right now is that kind of scandal.
Fourth, punishing Harry would lead to wider conversations about how the BRF operates behind the scenes and lead to greater focus on Harry's comments about the unspoken agreements. Edward VIII didn't get his HRH stripped and he abdicated and he was a Nazi sympathiser. There's no way letting Nazi sympathisers and (alleged) rapists keep their HRHs but stripping Harry of his isn't going to massively rebound against the RF.
Fifth, Harry is the King's son and he always will be. Removing a title doesn't change that and comes across as desperate.
Finally, Charles has to work hard to create the image of a King. A Monarch has to be head of their own household and head of the country. A Monarch has to be a diplomat. Why do you think Harry and Meghan were invited for the Jubilee, why they got shoved out to do high profile walks with William and Kate? Why Charles mentioned Harry and Meghan in his speech? Because it's part of the game. It's all PR! The BRF desperately need to make the family look unified right now, and to make Charles look like a peacemaker. How bad does it make King Charles look if he can't even keep peace with his own child? If he severely punishes his own child and removes his child's birthright, it'll do more to damage his own reputation than it will Harry's.
No. People online love their little revenge fantasies. In the real world, there's little chance of that.
And again the weird idea that Americans know or care about the intricacies of British titles. Having her HRH removed formally wouldn't make the slightest jot of difference.