Can a mother burn incense and worship Buddha for her daughter?

Of course. But you have to let your daughter and son-in-law do good deeds, so that you can really feel it.

For begging children, it is recommended to go to the hospital first to see if you are sick, treat you if you are sick, or other methods that can help you get pregnant. Secondly, it is a traditional custom to release people. Releasing is life-saving, and the most important thing is boundless merit. Susceptibility should be pregnancy.