Not sure what do you mean by "already", but according to the ones we spoke - they are seeing a huge spike in demand this last year (which they correlate with masks and lack of in-person learning in very young kids).
Couldn’t the spike in demand be related to all the articles talking about this issue?
I believe kids are better off in school and that the pandemic and response has certainly had an effect, but I can’t imagine that most parents would even know to consult a speech therapist otherwise unless suggested by the school as is usually the case.
[*] "Masks Can Be Detrimental to Babies’ Speech and Language Development" https://www.scientificamerican.com/article/masks-can-be-detr...