TP is dometic, water is weird, tap water is perfectly safe in US/Canadian cities, outside of rare issues. People with carbon filters might want to stock up, but that's flavour only.

Gas? I bet gas will go up from this, even if there is no reason.

The US alone almost produces enough crude oil for it's own consumption, it's only net -1 million barrels a day and that's not including production from Canadian oil fields. Total we're about 1.5m b/d net exporters of crude oil these days.

The TP disruption was, in my opinion, more about a major shift in consumption patterns rather than a supply disruption. When offices closed half of people's waking (ie pooping) hours shifted back to the home to the small individual rolls instead of the office sized rolls. That plus some panic buying and hoarding/scalping explains the whole thing as far as I know.

Because everything is globalized and almost every supply chain has a part from somewhere else.

The pumps in the gas stations eventually break and need repair

This is only East and Gulf Coast ports there will still be a myriad of ways to get critical equipment and parts into the country.

Globalized, means there may be critical components that need to be exported, so a forgone factory can send back some other critical part.

Not everything can easily be shipped via rail to ship from another port or exported by air.