Increase Speed of SQL

I am using MSSQL
- I am facing problems of getting a delay in SQL
- Using Entity Framework
- Using MVC .NET

My SQL Version:
(Microsoft SQL Server 2017 (RTM) - 14.0.1000.169 (X64)
Aug 22 2017 17:04:49
Copyright (C) 2017 Microsoft Corporation
Express Edition (64-bit) on Windows Server 2019 Datacenter 10.0 <X64> (Build 17763: ) (Hypervisor)
)