NOTE: Before filing a ticket, please see the following URL:
https://github.com/hapifhir/hapi-fhir/wiki/Getting-Help

Describe the issue
The ValueSet $expand operation in HAPI FHIR does not currently support the "EQUL" (equality) filter operator, which limits the ability to perform precise value set expansions based on exact matches.

Environment (please complete the following information):

• HAPI FHIR Version 8.2.1
• OS: Ubuntu
• Browser Chrome

Additional context
I have already submitted a Pull Request (PR) #7012 to address this issue, but I'm uncertain whether additional steps are required to ensure it gets reviewed by the maintainers.