On our country pages (find the list here) you may find a section called "revenue allocation", summarising where the money is transferred to. For an example, see Ghana or Peru.

Every EITI Report has a descriptive section on how the revenues are allocated within the government.

Examples of countries with good documentation on both budget produres (elaboration and approval of budgets) and actual budgeting practice.

Burkina Faso

The country's 2015 Report describes in detail budget procedures in chapter 4.2 (pp. 38), including a flowchart on p. 41.

Peru

Peru’s EITI Reports indicate how each revenue stream covered in the report is allocated. This includes the allocation to the national budget and to subnational entities. Peru' Ministry of Economy and Finance has an online and publicly available system, the Sistema Integrado de Administración Tributaria (SIAF), an integrated public financial administration system, that can be used to monitor the execution of the national budget, including regional and municipal government.  The SIAF allows the public to monitor the execution of all public expenditure funded by revenues from the extractive industry. Read more in Peru's initial assessment (pp. 68) and Validation Report (p. 6).