On the screenshot it is clearly visible for 4.4 that preprocessing is not performed by proxy, however this is not true starting from Zabbix 4.2
Documentation needs to be updated:
https://www.zabbix.com/documentation/4.4/manual/distributed_monitoring/proxies
https://www.zabbix.com/documentation/4.2/manual/distributed_monitoring/proxies

Prior to 4.2, all preprocessing was handled solely by the Zabbix server. Now, however, we are ready to deliver greater scalability, since all preprocessing functions can also be performed by proxies.

And one more note - the auto-registration feature is not mentioned here, but this is also processed by proxy. I suggest adding one more row - auto registration - Yes