Maybe just
julia> similar.(r)
3-element Vector{Matrix{Float64}}:
[0.0 1.37471521e-315; 1.376029345e-315 0.0]
[0.0 1.37471521e-315; 1.376029345e-315 0.0]
[0.0 1.37471521e-315; 1.376029345e-315 0.0]
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