Brokerage has two pipelines, and most software assumes one
Mandate supply and buyer demand are different businesses
A business broker sells twice. First you win the mandate: a proprietor decides to exit, you agree a valuation range and terms, and the business goes to market. Then you sell the business itself to one of a set of buyers, each of whom has their own qualification, funding position and timeline. These are genuinely different sales processes with different stages, and forcing them into one list is why most broker spreadsheets stop being useful in the second year.
Run as two linked pipelines, the numbers make sense. Mandate coverage tells you how many live sellers are unsold and for how long. Buyer supply tells you how many qualified acquirers are looking, in which sectors and at which ticket sizes. The health of a brokerage is the relationship between those two.