Check out this interesting website I found, which enables you to customize soothing sounds which you can use as a nice background or “white-noise” experience:

https://asoftmurmur.com/

The dashboard for A Soft Murmur, which is available as an app for both iOS and Android, allows you to adjust the volume or omit different nature or soothing sounds: waves, rain, wind, thunder, fire, birds, crickets, singing bowl, white noise, or coffee shop. For example, combining rain and thunder sounds will mimic a thunder storm. If you choose to upgrade to their premium plan, you can then access 13 more sounds, and have access to any new sounds as they are added to the app.