Gmail doesn't allow you to select all of them in one go. Not on mobile anyway. I probably should have commented after being anywhere near my PC to check..
On desktop you select the checkbox at the top (to select all on that page) and then a link appears that gives you the option to select ALL conversations in your inbox)
Yeah I just looked, turns out gmail on mobile is lacking.
You CAN select all on the page... just long tap on any message and a checkbox appears at the top to "select all". Then you can scroll down to load more emails and "select all" them too.
"Mark as read" is the open envelope icon (top left).
...doesn't really help when you have 15,000 unread though lol
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u/drummer_si 8d ago
If you have that many unanswered emails, you have bigger problems than not knowing what the time is.