People with a diverse sexual orientation, gender identity and expression, and sex characteristics (SOGIESC) experience poorer mental health and a higher risk of experiencing distress, addiction, and suicide in Aotearoa New Zealand, linked to social discrimination. The quality of mental health and addiction services play a critical role in these inequities yet, in general, these services fail to achieve equitable outcomes for this population. The Government has provided targeted nationwide funding to services that provide mental health support to rainbow young people this year. This research activation activity will undertake a gaps analysis to understand where funding has addressed service gaps and to identify remaining gaps in mental health and addiction support for SOGIESC-diverse (rainbow) communities. The findings from this research will lead to further research to investigate how mental health and addiction service investment can contribute to improved health equity for SOGIESC-diverse (rainbow) communities.