CA new claim

How long is it taking CA to assess new claims these days?

I claimed CA on the 8th March 2021. Sent in payslips/paperwork etc in support. Also requested backdating to 1st Jan 2021 as my earnings so far this year have been well below the financial limit.

not heard anything so far other than a letter my daughter received saying someone had claimed CA for her and it may effect her IS/ESA.