In short, no.
In depth Info
So that our community has the latest info on this topic & to know that this doesn’t “directly” effect MainWP.
Apache Log4j is a Java-based logging utility originally written by Ceki Gülcü. It is part of the Apache Logging Services, a project of the Apache Software Foundation. Log4j is one of several Java logging frameworks. - Log4j - Wikipedia
However, there are things that you need to do If you DO run / maintain your own Servers ~
New LOG4J Scanners have been release by the FBI and other ORGs in order to help identify vulnerable Server Networks.