Telegram select part of message and copy
I don't think there is any way to do what you're looking for. It's up to the Telegram team if they want to allow parts of a message to be copied.

Similarly, the half word search is not supported on Telegram. You have to search with full words.

Telegram is an open-source project. You can talk to the developers on Github regarding your request.

Here is the project link - https://github.com/DrKLO/Telegram