Methods, systems, and devices for user equipment (UE) device-to-device sidelink wireless communications with transmit power adjustments provided through transmit power control requests. A group of UEs may use sidelink groupcast transmissions for communications, and a sidelink groupcast transmitter may increase or decrease transmission power of the groupcast transmissions for more efficient and reliable transmissions. Each UE that receives groupcast transmissions from the sidelink groupcast transmitter may have a different set of wireless resources that may be used to transmit a transmit power control indication to request higher or lower transmit power at the transmitting UE. Alternatively, wireless resources for providing the transmit power indications may be separately provided for TPC-UP indications and for TPC-DOWN indications.