We are moving over to SharePoint Online, and have some document libraries where we are heavily using Metadata on the files to sort and search for content. In SharePoint on-prem (2013) we were able to provide "Key Filters" to our users. This allowed them to do simple searches like, type a customer number in the customer number search field and it would filter the list to only documents that have that value as the customer number. Same was for the Customer Name, you could just type the name and hit search.
Now, in SharePoint online, the available methods for filtering a document library i have found give the user a full list of ALL customer numbers to select from, and ALL customer names to select from, etc. This means that the user will need to scroll through a list of thousands of customer numbers or names to find the one they want, and then click on it. This is highly inefficient.
Simply doing a general search on the library in the top search bar isn't the best solution either since these are just numbers, those values may show up inside the documents or as part of other metadata.
I have not found a way to disable this or change the filter method on number and text fields on the library. Has anyone else found a solution for this?