Generally adopted children are treated the same as biological children under Texas law. However, because the will explicitly says "of the body,"...

As below

You definitely need local counsel. Please feel free to reach out if you would like assistance

Is there any way to prove any of this? How can we make her produce the will?

You absolutely need to hire a local probate attorney. This is not something you can contest without counsel.

Can someone tell me about how long it should take to have an executor appointed by the court? (Texas)

The other answers are correct that not enough information has been given. Do you know that the will has been admitted and that a petition has even...

Do I need to get the will probated, and what do I need to do to transfer the company to my name? Thank you.

You should hire an attorney that has both business and probate experience. You need to ensure both that you file for probate if needed and that all...