Sure sounds funny but here's a few things:
* Lukashenko is president since the post was created, his position is quite solid and will be useful when Putin's time is over.
* just two years into his presidency he signed a Union treaty with Russia, then still ruled by Yeltsin. Russia always understood that treaty as Belarus becoming part of Russia, something Putin is very keen on, extending Russia by force has happened more than once since 2000 but Belarus joining peacefully would push Putin's popularity. Lukashenko again and again promised things like introducing a common currency by 2004, 2005, 2006 and "maybe" 2007. Didn't happen. For Lukashenko it's a carrot he dangles in front of Putin.
* Belarus didn't join the war against Ukraine, and Lukashenko profited a lot when he got Wagner to stop their rebellion.