After updating to Zabbix 6.2, I noticed a weird thing with Proxy.

From proxy health monitoring, the internal item "Zabbix proxy: Utilization of history poller" got unsupported with the following message.

No "history poller" processes started.

When checking the proxy processes, I noticed that, in fact, it is not started.
Also, that item is not available for newer Zabbix OOTB templates.

This request, ZBXNEXT-7498, seems to relate to this issue, but I'm not sure.

In summary,
Proxy Process Types doc says this process exists for Proxy.
Supported Internal checks doc says it is available for Proxy.
Standard Zabbix Proxy Health template does include an item for History Poller

Zabbix Proxy configuration doc does not include StartHistoryPollers.
Upgrade notes for 6.2.0 doc does not mention History Pollers.

Therefore, I'm lost with this.
The Proxy is certainly working without History Poller.

Maybe I'm missing some changes in-between version updates, or the documentation is missing some adjustments.