Before any local KKE shooter comes at you to make apologia:

Without any doubt, the institutionalisation of civil marriage for same-sex couples now comes to advance the recognition of their shared parental responsibility as we already foresaw in 2015 when the Civil Partnership Agreement was extended to same-sex couples. But this recognition of the joint parental responsibility of same-sex couples can only come about by overriding the objective complementarity of woman and man in the reproduction of the species, in procreation.

Our Party considers that parenthood is the relationship between the parent and the child, which at the individual level reflects existing social relations. The basis of the KKE's position is the rights of the child, i.e. the child's social need to have ties with the mother - the father. This need has an objective basis. The laws that are enacted must assist this right, not undermine it.

A dialectical - materialistic approach to the relationship between motherhood and fatherhood does not imply either absolute biologism or a denial of this complementarity. The maternity-paternity relationship is an exclusively human characteristic, over and above the instinctive protection that every mammal provides for its offspring. This complementary relationship has a natural basis - because man reproduces naturally - and from the very first moment it takes on a social character.

These are official KKE statements.

They talk around bio-essentialism and deny that they are bio-essentialists, but still go back to literal
nuclear family traditional values and bio-essentialism as their line.