[R-meta] Hypothesis Testing of R2 in metafor

Hello Colleagues,

My understanding is that it is common to report the p-value for the omnibus null hypothesis that all the coefficients in a model are zero, next to an R^2 value for an rma.mv()/rma() model.

If the above assumption is correct, then, should one also take that p-value to be a null hypothesis test of R^2 being zero or there is a separate test for R^2?

Thanks in advance.

Best wishes,

Zhouhan