I want to ask that if there is a cheese product "paneera" in the market. Then what should I say?
- Cheese is available under the name of paneera?
OR
- Cheese is available in the name of paneera?
OR
- Cheese is available available as paneera?
under the name of specifies that something uses the name of/belongs to a person, while in the name of indicates that something/someone is representing another thing/another person. available as doesn't get its own dictionary entry, and is used in a variety of situations, ranging from someone available to do something, an alternate name for something (usually preceded by also), to something available in another form.
None of the above can be used in your situation. Therefore, I'd suggest keeping it simple and use: Paneera cheese is available.