If autocrats manage to fully take over, they'll just enact a policy that assumes you're guilty of the charges if the phone, for whatever reason, gets wiped (especially after entering a code you provided). Your "right to silence" isn't gonna last forever.

You can't fix an abuse of power issue with a technological solution, its only a bandaid, and it will stop working when blood keeps gushing out (aka: the instutions of democracy starts to completely fall apart)

xda probably has that

Grapheneos is only installable on unlocked phones. Specifically pixels. There is a complete list on their site

I doubt these tools would help you. They are primarily for pulling data off devices, spying on them, or controlling them.

Even if you could buy them as a private individual you wouldn't want to pay that cost. There might be pirated versions, but most who have use of these tools have no interest in pirated software.

There are extremely skilled people who make a living finding vulnerabilities, so there's not a lot of low-hanging fruit left and those who find serious vulnerabilities have generally worked hard to do so.

When a single exploit can pay enough that you could pay off all your loans, buy a house, or not have to work again for years, or maybe ever. Why would you go through all the trouble of finding it to release it publicly and get nothing? Especially when it's going to be used by these shady companies either way.

I'm not saying exploit selling is morally right, it certainly isn't, but if I was offered millions of dollars to do the wrong thing, I'm not sure I would turn that down.