How to migrate claim validation For .NET to MSAL?

Question

In our server side, we use namespaces as below to fetch certification from AAD and validate JWT tokens from clients, not sure is this also part of the migration to MSAL? If so, are there any guides to do this?

using Microsoft.IdentityModel.Tokens;
using System.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.IdentityModel.Metadata;
using System.ServiceModel.Security;
using System.Xml;

Or this migration only limits to namespace Microsoft.IdentityModel.Clients.ActiveDirectory?