The 2015 Roland Garros champion has not played a pro match since the 2021 Doha, but plans to play Paris.
"At the moment, as far as I know, he is not vaccinated," Monte-Carlo tournament director Zeljko Franulovic said of Novak Djokovic,
The pair will be together at Doha, which is scheduled for February 20 to 26.
The Greek says that Enqvist is an addition to the team, rather than a replacement for his father and coach, Apostolos.
The 2017 champion Andy Murray returns to Dubai for the first time since his title run.
World No. 1 will need to be fully vaccinated to play Indian Wells next month.
A ticket for the 2022 Wimbledon ladies final will match the price of a men's final ticket, The Times reports.
