Minimum coverage for required activities

Due to a lack of primary data, is it possible to use another parameter to calculate minimum coverage for an SBTi required activity? E.g for CRE portfolio, instead of using activity data (m2), to use Asset under Management (outstanding amount)?

For SDA method, you must use the physical intensity parameter to calculate the minimum coverage. But for other approaches, it is also possible to use total loan value, or portfolio weights in the case of equity portfolios

Thanks a lot Eoin for the reply