For the 2020 season, Lomko switched to the ADAC F4 Championship, partnering Elias Seppänen and fellow rookies Tim Tramnitz and Ollie Bearman at US Racing.

[8] To partake in his main campaign, Lomko returned to US Racing to once again drive alongside Tramnitz in the German F4 series, but this time being joined by Luke Browning and, on occasions, Alex Dunne.

In 2022, Lomko progressed to the Euroformula Open Championship, driving for CryptoTower Racing alongside Christian Mansell and series returnee Josh Mason.

This was preparation for Lomko's main campaign in the European Le Mans Series, where he stepped up to the LMP2 category to partner José María López and Reshad de Gerus at Cool Racing.

After driving in the final three races of the 2024 AsLMS season, Lomko would join Inter Europol Competition with Tom Dillmann and Sebastián Álvarez in the ELMS.

[26] At the second round in Le Castellet, two separate gearbox failures for the respective leaders gave the #43 Inter Europol lineup an unexpected victory, Lomko's first in sportscar racing and the team's maiden win in the series.