Per a pthomas745 post they are the low point drains for the 2022 model 320.
“The low point drain valves came up this morning over on the FB page. The picture in the comment above shows the Hot/Cold water low point drains, and shows the fresh water tank drain there, too. An owner this morning of a 2022 320 CS-S had only this configuration. The Fresh Water tank drain was over behind the passenger side wheel.”
And the Fresh Water Tank Drain over behind the passenger side wheel.
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2020 Tacoma TRD Off-Road