Over 6 Weeks, Return Still Processing

Hello. My return was accepted on March 9, and the "Where's My Refund Tool" still says my return is processing. I E-filed through Turbo Tax. Turbo Tax said I am eligible for Recovery Rebate Credit for the two stimuli of 2020, so that is included in my return. Could this be why my refund is taking so long? Also, whenever I try to speak with the IRS on the phone it always says they're too busy and to call later... Any help is appreciated. Thanks.