Newly Created Picklist Value Not Appearing on Record

Here's a breakdown of potential causes and solutions:

1. Active Status:
Ensure the picklist value is active in the field definition. You can check this in Setup -> Object Manager -> [Object Name] -> Fields & Relationships -> [Picklist Field Name] -> Edit. 
If it's a global value set, check its active status as well, according to a Salesforce community post. 
2. Record Type Availability:
Verify that the picklist value is available for the specific record types the user is working with. Go to Setup -> Object Manager -> [Object Name] -> Record Types -> [Record Type Name] -> Picklists Available for Editing -> Edit. 
If it's a Sales Process field (like Opportunity Stage), check the Sales Processes settings in Setup -> Sales Processes -> [Process Name] -> Define Stage Picklist Values. 
3. Field Dependencies:
If the picklist is dependent on another field, make sure the new value is also added to the appropriate controlling field's field dependency matrix. 
4. User Profile Permissions:
Ensure the user's profile has the necessary permissions (Read, Edit) to view and edit the picklist field and the related record type. 
5. Default Value:
If you're expecting a default picklist value to show up, confirm that it's been set correctly in the field definition or the record type. 
6. Other Considerations:
Lightning vs. Classic:If the issue is specific to Lightning Experience, check for any dynamic fields or configurations on the Record Page that might be affecting visibility. 
List View Filters: When filtering list views by picklist fields, ensure the filter criteria doesn't exceed the 80-character limit. 
Record Type Assignment: When adding new values, ensure they are assigned to the correct record types during the initial creation process. 
Refresh Data: In some cases, Salesforce may require a few hours to fully update picklist value visibility across all areas.