A few helpful links for entering Slovenia:

• General requirements: https://infotujci.si/en/third-country-nationals/
• Visa requirements by country: https://www.gov.si/en/countries/

Most Covid-19 restrictions have recently been lifted in Slovenia, and there is currently no RVT (recovered/vaccinated/tested) requirement in force for border crossing. However, this is subject to change. The latest on the current Covid-19 restrictions:

• https://www.gov.si/en/topics/coronavirus-disease-covid-19/