@Robert Antwi Thank you for reaching out.
Under server parameters Blade, did you enable the slow_query_log ?
Did you set up a Log Analytics workspace to collect and analyze the slow query logs.?
Use Workbooks: In the Azure portal, under Monitoring, select Workbooks and choose the Query Performance Insight template. This will help you visualize query load, active connections, slow query trends, and details.
Please check the below doc for furthermore details.