I've found these two outlet strips to be handy for various high-density systems:
First is a 20-space rack-mount strip, that has the added flexitility of outlet re-orientation if needed. Doing so requires some internal re-wiring, and as such would lose its UL designation, but the outlets they use can be rotated 90-degrees in the existing metalwork. I've got one I used un-modified, and the other is awaiting 'adjustment' to meet a certain mix of wall-wart power supplies. $90.
https://www.amazon.com/gp/product/B00E8JXVKA/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
The second is a 22-outlet strip with a variety of orientations and some USB capability. 10 wart-ready perimeter outlets, with others in the middle. USB at the switch/cord end. Different cord lengths available, too. ~$40 depending on cord length.
https://www.amazon.com/gp/product/B08Z2ZKVXX/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
I also use high-output, multi-tap USB chargers for some things, but always be mindful of a system's "single point of failure" gotcha.