According to the track record, National Testing Agency or NTA provides the answer key of JEE Main within one week from the last shift of the JEE Main examination. So, tentatively NTA will release the answer key in the first week of July 2022. To download the answer key, you will be required to enter your application number and password. While, if you want answer key from unofficial sources, then you can visit the various coaching which have already released the unofficial answer keys.

Hope I have answered your question. All the best!