In short, 1GB is too small, you’d allocate 4GB at least.
The best reference to start is the base OS official documentation. This is for Rocky Linux, but there is one for Debian for sure: Chapter 15. Getting started with swap | Managing storage devices | Red Hat Enterprise Linux | 9 | Red Hat Documentation
Edit:
For swap file on SSDs, you may want to tune swappiness. Please, refer to this article: How To Add Swap Space on Ubuntu 22.04 | DigitalOcean
fallocate may be dangerous to use in some environments, because it generates a faulty swap file. The dd command is generally slower but safer.