Even if you do target windows, tauri apps can be a couple megabytes

Now do a data grid backed by a database.

Just some lines more? I am sure modern LLMs can print out tons of different versions for your specific usecase and it will be way less than 2.5 MB.

HTML and JS is compact. The browser is not. But often installed already, so my PWA is very small as a result, but behaves quite native.

(But if you mean, that Lazarus can do that easily with a GUI, that would still be cool. Can it?)