If you take a look at Maven Central it's clear that specs2 was published for scala native 0.5 under different versions for Scala 2 and Scala 3.
More in detail, the only available versions are:
Version 4.20.7 for specs2-scalacheck_native0.5_3
Version 4.20.6 for specs2-scalacheck_native0.5_2.13
Version 4.20.6 for specs2-scalacheck_native0.5_2.12
If you take a look at Maven Central it's clear that specs2 was published for scala native 0.5 under different versions for Scala 2 and Scala 3.
More in detail, the only available versions are: Version
4.20.7
forspecs2-scalacheck_native0.5_3
Version4.20.6
forspecs2-scalacheck_native0.5_2.13
Version4.20.6
forspecs2-scalacheck_native0.5_2.12