The OBS Project does not directly provide the facilities to receive donations for your stream in OBS Studio. However, you can receive donations directly to you by using a third-party provider, including some alerts providers.
Some alerts providers also allow you to display an alert on your stream when you have received a donation via a Browser Source.
You can also receive donations for fundraisers directly through your streaming platform and some third-party providers. For instructions on fundraising:
To display a donation button on your streaming service's profile, you need to copy the link or code given by the third-party provider of your choice then add it directly your streaming profile for viewers to see.