Ubuntu Plans for Mini ISO Images for Minimal Desktop Workloads
Answering a question from an Ubuntu user about the possibility of a minimal Ubuntu ISO image, the developers confirmed that an official minimal ISO image (less than 200MB) is under development.
The said work is already underway and has progressed a lot. The plan is to introduce an alternate minimal installer for the upcoming Ubuntu 23.04 Lunar Lobster release.
Here are all the details.