Hi and welcome to the forum @jrd10 !
You can most definitely use macros on online. However, that feature is by default disabled. To enable it you need to tweak your coolwsd.xml file in the following section:
<enable_macros_execution desc="Specifies whether the macro execution is enabled in general. This will enable Basic, Beanshell, Javascript and Python scripts. If it is set to false, the macro_security_level is ignored. If it is set to true, the mentioned entry specified the level of macro security." type="bool" default="false">false</enable_macros_execution>
<macro_security_level desc="Level of Macro security. 1 (Medium) Confirmation required before executing macros from untrusted sources. 0 (Low, not recommended) All macros will be executed without confirmation." type="int" default="1">1</macro_security_level>