DocumentQueryDynamicComponent: default value for pageSize cannot be overridden

It's not possible to change the default value for page size by configuration. It is defined in DocumentQueryDynamicComponentInfo as follows:

@Parameter(name = "pageSize", defaultValue = "10")
int getPageSize();

Using a dynamic parameter 'pageSize' like so

/pageSize:
jcr:primaryType: hst:dynamicparameter
hst:defaultvalue: '20'
hst:valuetype: integer

doesn't work out, but the intent does seem to support this in org.hippoecm.hst.platform.configuration.components.HstComponentConfigurationService#populateAnnotationComponentParameters and org.hippoecm.hst.core.component.HstParameterInfoProxyFactoryImpl.ParameterInfoInvocationHandler#invoke.