Depending on how the data input is taking place (via the editor, live app / form etc.), we should be able to control the data entry, to an extent.
If you’re open to it, would love to catch-up over a screen-share session so I could better understand and advise on an approach.
However, we do not have a feature to lock specific cells on the editor (like you’d expect from using Google Sheets or Excel) — something that we are considering to add in the future.
To the extent of what I could imagine your workflow to look like here’s an alternative to restrict the data being written in specific cells -
Hope this helps!