Adapt WorkflowSession to a ResourceResolver

As mentioned by Ashutosh, you can get resource resolver from workflow session.

Another way of good practice is to get serivce resource resolver, and you can write this reusable mention in one utils class and call it in your workflow

Example:

public static ResourceResolver getServiceResolver() throws LoginException {
Map<String, Object> param = new HashMap<>();
param.put(ResourceResolverFactory.SUBSERVICE, "my-custom-service");
BundleContext bundleContext = FrameworkUtil.getBundle(MyUtils.class).getBundleContext();
ServiceReference resourceResolverFactoryRef = bundleContext
.getServiceReference(ResourceResolverFactory.class.getName());
ResourceResolverFactory resFactory = (ResourceResolverFactory) bundleContext
.getService(resourceResolverFactoryRef);
return resFactory.getServiceResourceResolver(param);
}

Refer more details in : https://aemhub.blogspot.com/2020/12/how-to-get-service-resource-resolver.html

Regards

Praveen