Furthering Opioid Services, Training, and Education Resources Act or the FOSTER Act This bill reauthorizes through FY2026 and expands the scope of grants available for states and Indian tribes to address the opioid crisis. Specifically, the bill allows the use of grant funds for workforce recruitment and training, health care services, and foster and adoptive parent recruitment and training to support opioid abuse prevention and treatment services for children and caregivers, kinship care families, and kinship caregivers.