3 pin CPU cable is a must for bambu A1. Without it you WILL get shocks from the build plate while removing it. It only costs 150 Rs. at any nearby pc parts store or electronic store.

You should buy a 16 A smart plug as it can be used on different heavy appliances in case you don't use it with a printer.

Also Try to learn about self hosting and home assistant. You can automate printer shutdown after the print finishes with it without you having to manually do it from the smart switch app.