You can find these mixes on their YouTube channel (Marin & Rumyana Official) and search for "Marin & Rumyana Retro Mix" to listen to their most popular compilations, such as those released in 2022.
Songs that evoke nostalgia, similar to popular 90s hits from artists like Rumyana and others. marin_rumyana_retro_mix_marin_i_rumyana_retro_miks
Focuses on the vocals of Marin & Rumyana Cholakovi. You can find these mixes on their YouTube