Meeting house websites
If you already attend a Quaker meeting, a good way to find out if it holds online meetings is to go on your meeting's website. Many meetings have up-to-date websites and will list information about how to join them online there.
Many meetings keep members up to date using Facebook. If you're struggling to find an up-to-date website for your meeting and have a Facebook account, try searching for the name of your meeting on Facebook and seeing if anything comes up, or checking any related Facebook groups you're already a part of.
Some countries have resources that act as directories of Quaker meetings in their country. These country-specific pages contain links to those.