Thanks for your response Zimba. She was earlier granted visa as a dependent and still not living independent life. It says you can include older children in your application in such scenarios. Can you check and confirm please?
As the gov website says below:
https://www.gov.uk/indefinite-leave-to- ... ly-members
Children 18 and over
You can only include older children in your application if they both:
- were under 18 when they first got permission to be in the UK as your dependant
- still do not live an independent life - for example, they have not got married or had children