I have referred this question but I am not clear still.
Is this sentence grammatically correct, Can we use And But together for example
The mausoleum will not only be the first remarkable example of Mughal architecture in the country and but will also become a prime archetype to upcoming projects of the dynasts, including the Taj Mahal. (source)
No you can't.
You need to drop the and.
The sentence then contrasts the use of not only with the natural follow up but..also.
You will find numerous examples and explanations of the usage at sources such as these.
https://dictionary.cambridge.org/grammar/british-grammar/not-only-but-also
https://www.grammarly.com/blog/parallelism-with-not-only-but-also/
https://www.dailywritingtips.com/5-tips-for-fixing-%E2%80%9Cnot-only-but-also%E2%80%9D-errors/
