Modulus estimates of semirings with applications to boundary extension problems

In our previous paper [GSV2020], we proved that the complementary components of a ring domain in ${\mathbb{R}}^n$ with large enough modulus may be separated by an annular ring domain and applied this result to boundary correspondence problems under quasiconformal mappings. In the present paper, we continue this work and investigate boundary extension problems for a larger class of mappings.