Yes. Anyone 6 months and older who has completed their primary series of Moderna can receive a bivalent booster if it has been at least two months since their most recent vaccination/booster.
Anyone age 5 and older who completed their primary series of Pfizer can receive a bivalent booster if it has been at least two months since their most recent vaccination/booster.
Keiki six months through 4 years of age who received two of their three primary doses of Pfizer vaccines will receive a bivalent vaccine as their third primary dose. Keiki who completed all three doses of Pfizer’s primary series are not yet eligible for a bivalent booster.
Sources: https://www.fda.gov/emergency-preparedness-and-response/coronavirus-disease-2019-covid-19/covid-19-bivalent-vaccine-boosters (FDA)
https://www.mayoclinic.org/coronavirus-covid-19/vaccine#expert-videos (Mayo Clinic)