Lasg seeks cooperation of all to contain covid 19

Here is a rewritten version of the sentence in a more formal and professional tone:

"The Lagos State Government (LASG) is seeking the cooperation of all citizens to contain the spread of COVID-19 and mitigate its impact on the state."

Or, if you'd like a more concise version:

"The Lagos State Government (LASG) urges all citizens to cooperate in containing the spread of COVID-19."