Introduction:
The COVID-19 pandemic provoked uncertainties, disrupted implementation of health policies in the Unified Health System, known as SUS in Brazil, and new healthcare demands. Therefore, efforts to assemble resilient health systems with post-pandemic recovery plans, maintenance and protection of advances in public health, which narrate experiences with the practice of institutional support and collaborate with the implementation of public health policies are necessary to inspire governments and people in other health related projects. OBJECTIVE: To share the learning synthesis developed with institutional support during the implementation of SUS regionalization policies.

Method:
The following study was developed in three Brazilian states, in the Project for Development of Institutional Support in SUS (PROADISUS). Thus, virtual meetings were held between specific working groups of institutional supporters and those supported: health managers and technicians respectively. Furthermore, the following strategy expanded the technical debate within working groups, strengthened the process of planning activities and agreed on the expanded work agenda to carry out the Health Situation Analysis and identification of regional health priorities, mediating the intervention proposals, products of the interaction and reflection between the tripartite strategic actors, their priorities and demands of healthcare areas.

Results:
The greater interaction, debate and instrumentalization of managers and technicians affected transformations in work processes, contributing to overcoming the challenges of regionalization and building the tripartite agenda, strengthening regionalization beyond a physical plane, that is, capturing the perceptions and subjective views that mediate the desires of the responsibilities assumed in joining the project.

Conclusion:
In the context of the pandemic, the institutional support strategy transformed work processes, operated as a strategic method that induces new ways of health management by expanding institutional democracy, impacting the implementation of policies capable of responding to health needs directed by the values ​​of equity and social solidarity.