Can I send to several people at once?

Yes, with Multi-send, on Polygon only. You can send to between 2 and 200 recipients.

You enter one total, and it is split evenly between the recipients, rounded down. (The browser extension works differently, so check the per-person figure before you confirm.)

For a token rather than POL, the first step is an approval for exactly the total. The batch then goes out as a single transaction.