Dear VANDENBORNE Mike (HR)
Good day! Thank you for posting to Microsoft Community. I am happy to help you
Currently, based on my testing and research, SharePoint online cannot customize permissions for columns.
However, if you have development resources, you could create a custom solution using SharePoint Framework (SPFx) to provide a more flexible column management experience for users with Contribute access. This might be possible with code that builds specific columns to suit your needs. Please understand that this query is outside of our support boundaries. For you to be assisted properly, please reach out to Questions - Microsoft Q&A; I am sure that our experts from that team can address your query effectively and accurately.
The reason I ask you to post a new thread is that in Answers forum, we have limited resources and very little knowledge about SharePoint Framework (SPFx) and in Questions - Microsoft Q&A, you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction.
Please accept my apologize. However, we appreciate your understanding. I do understand the inconvenience and apologize for it.
I think you may report this behaviour to Microsoft SharePoint product developer Team (we also submit feedback from our side as well).
As Microsoft get their attention is through the feedback mechanisms and Microsoft roll out fix bug requested from Microsoft 365 customers. I recommended you may also let your valuable request to Microsoft SharePoint product developer related Team through the feedback mechanisms.
In this scenario, we sincerely recommend you, regarding to your concern, I request you, please send your feedback via this link:https://feedbackportal.microsoft.com/feedback/forum/34aa14b7-212b-ee11-bdf4-000d3a1f8cedSharePoint · Community, Microsoft product developers team monitor this site 24/7 and they will receive your request. This is the best platform to let related team hear from you and make the products and services better for you and others.
Thank you for your cooperation and understanding. Please do not hesitate to post your queries in Microsoft Community and we will always do our best to assist you!
Sincerely,
Tin | Microsoft Community Moderator