Can I modify a deep link to navigate to a specific activity from Workspace?

Yes. You can open a specific activity based on the activity ID from the Accounts page in Workspace using a deep link. For example, this sample URL syntax allows direct links to the Activities subtab from the Account:

https://<hostname>:<port>/crmUI/faces/FuseOverview?fndGlobalItemNodeId=itemNode_workspace_workspace&fndTaskItemNodeId
=ZCA_CC_INTERACTIVE_UI_CRM&fnd=%3BentityName%253DAccount%253BsubTabName%253DActivities%253BrecordId%253D@{1}%253B%3B%3B%3Bfalse%3B256%3B%3B%3B

If you want to open a specific activity based on the activity ID, you replace the <RecordId> with the actual value of the <ActivityId>. However, you must first use the CAST function as follows:

CAST("Activity"."Activity Id" AS NUMERIC)

This converts the ID from a text data expression to a numeric value so that you can use the numeric value to navigate to the specific activity you want.