The Ukrainian government has repeatedly stated that it will not extend a transit agreement, which has provided political, commercial, technical and legal grounds for the transit of Russian gas across Ukraine to Slovakia, the Czech Republic and Austria during 2020-24, after it expires on January 1, 2025, as long as the armed conflict between two countries continues.
https://www.neglobal.eu/eu-searches-for-alternatives-before-russian-gas-to-europe-via-ukraine-stops/