Can you statistically compare two indirect effects in metaSEM?

I'm conducting a meta-analytic structural equation model (MASEM) using the two-stage approach in metaSEM in R. I have fit a model with two indirect effects, and would like to compare them to see if they differ in magnitude. Is it possible to constrain the indirect effects to equality so I can compare this model fit to the full model? Or is there some other way of testing differences between indirect effects?

Stage 2 R code here:

stage2total <- wls(Cov = cordat, aCov = Acov,
n = sum(unique(SGMAdata.db\$N)), Amatrix = A, Smatrix = S,
diag.constraints = TRUE,
intervals.type = "LB",
mx.algebras = list(
depindirectEffect = mxAlgebra(b21*b42,
name="depindirectEffect"), indepindirectEffect =
mxAlgebra(b31*b43, name="indepindirectEffect"))
)

summary(stage2total)