Toilet paper is the one thing I do not want to run out of, so I always have plenty of backup. All of my bathrooms are well-stocked, and I make sure there's spare rolls in the basement.
When I replenish one of my bathrooms, if I'm getting low on spare rolls, I pull out my phone and order more off of Amazon. The price is quite similar to the grocery store, and it's about as easy to order more from Amazon as it is to put it on my shopping list and buy some at the grocery store.
BTW: I'm not as crazy as my parents. At the beginning of the pandemic we all had plenty of backup rolls, but my parents are a little neurotic and had my sister and I looking for their specific brand. (They think their septic tank will explode if they use anything but Scott.) I managed to get a giant box of Scott, with plenty of toilet paper for all three of our households, sent to my house. My parents refused to use it because it was 2-ply instead of 1-ply. When I finally went inside of their house when it was safe, they managed to hoard a 2-year's supply of toilet paper in their basement.