There was a previous thread about this a few days ago.
Guided reading per se is not essential. Decent, planned, consistent teaching of reading - whether individually, whole class, or as guided reading IS essential.
If your daughter is making progress in all aspects of reading - decoding, comprehension, expression, fluency etc etc - then she is in all prbability receiving good reading teaching, whether it is 'called' guided reading or whole class reading or individual reading or as a session at the end of phonics or as part of literacy or whatever.
If she is not making progress, or you believe that all progress is due to what she is doing with you at home and there is no evidence of progress through in-school activity, then that is time to raiuse the concern. Not that she doesn't have a session explicitly called 'guided reading'.
[I do guided reading with most of my class, individual reading with outliers at both ends, daily reading out loud in front of the whole class for everyone, and there are lots of interventions for any children with difficulties.]