Hi @Ray Waldron ,
Are you using Sharepoint Online? We can’t change the list view threshold in SharePoint Online. The number 5000 is fixed and controlled by Microsoft to ensure better performance in SharePoint Online, as it operates as a shared tenant environment. So, increasing the list view threshold is not possible. This is by default. If it’s SharePoint On-premises, You can change the list threshold via the Central Administration site: How to Increase List Threshold in SharePoint Server?
You can store up to 30 million items or files in a list or library. However, when a list view shows more than 5000 items, you may run into a list view threshold error. This is uncontrollable and uncertain.
I can't reproduce your problem. If you think it affects your work, I suggest you make a services request in the M365 admin center.
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