Packet overhead

Hi,
I was browsing through some information on my router and notice there was some overhead information on one of the speed tests.

Just wondering if anyone would know if this is something worth accounting for when setting the "per packet overhead" or any other setting in SQM cake. This topic is a related to my last post https://forum.openwrt.org/t/sqm-link-layer-adaptation-settings/73314?u=jdqkr2. Some of my router information is in that post. Any feedback is appreciated even if this new information is irrelevant.

thanks