Hello Dalvir Singh,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
Regarding on what you really need:
How to integrate these AI assistants/bots into MS Teams so that end users from my platform can deploy their assistants directly into MS Teams chats.
After you must have tested your bot and ensure its functionalities. Deploy your bot to a hosting service like Azure App Service and add Bot to Teams by creating an app package for your bot in the Teams Developer Portal https://dev.teams.microsoft.com/home then, upload the app package to Teams and configure it for your organization. https://learn.microsoft.com/en-us/azure/bot-service/channel-connect-teams?view=azure-bot-service-4.0 Optional to this, you can publish your bot to the Teams App Store for broader access https://www.microsoft.com/en-us/microsoft-copilot/blog/copilot-studio/easily-build-and-use-bots-within-microsoft-teams-with-power-virtual-agents
Any guidance or resources on bot registration, MS Teams bot integration, or APIs for Teams would be greatly appreciated.
For detailed steps and more reading: https://learn.microsoft.com/en-us/azure/bot-service/channel-connect-teams?view=azure-bot-service-4.0 and https://techcommunity.microsoft.com/t5/teams-developer/help-with-deploying-ai-agents-to-microsoft-teams-chats/m-p/4258795 should be a great resources.
I hope this is helpful! Do not hesitate to let me know if you have any other questions.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful.