Get a galaxy smart watch. If you leave your phone in another part of your house you will likely still be in bluetooth range so you don’t necessarily need the LTE version of the watch.
If you get stuck in a room you can use the watches text app or whatsapp app to send a message.
Also, set up your hard fall alert to notify family or a friend. If you were to fall, the watch should auto notify your desired contacts.
Once Apple decided not to include charging bricks it was a foregone conclusion that other manufacturers would follow.
You don’t have to buy Samsung ones. Any charger works, but it can’t charge faster your phone faster than the charging brick/cable combination is rated for.
Chances are someone’s old phone has gotten to the point of limited battery capacity and then they upgrade to a new phone with a larger and fresh battery and it is going to take much longer to charge even with the old charging brick.
Just buy an Anker charger with a few ports that are rated at different watt charging speeds. And a good cable rated for 5W or better.
Since everyone is standardising on USB-C after the EU insisted, both will serve you well for many years.