Enzo Maresca will gets long term duration contract with Chelsea that he was received 5 years contract which mean if Chelsea not sack him early then Enzo Maresca will be at Chelsea until 2029 however a bit surprised to see the contract duration given by Chelsea to Enzo Maresca because to the previous manager they never gave a contract duration this long seems Chelsea believe Enzo Maresca could be the right manager for them and the departure of Enzo Maresca is forcing Leicester to find a new manager immediately so the recent rumour is they starting to approach some managers
This is not the first Chelsea gave a long contract duration, before that Chelsea also gave 5 years contract duration to Graham Potter, but Chelsea sacked him even though he wasn't reach a year. So, Chelsea can sack him whenever they want.
It's a mistake for Chelsea to sack Pochettino and hire Maresca, did they not see Maresca was the one who make Palma Calcio 1913 relegated from Serie A to Serie B? perhaps this is what Chelsea wants, they want Chelsea to relegated from Premier League.