Thank you, but I forgot about the Localize Media add-on, the add-on will also take care of possible duplicates with the same filename and should be more easy to use.
About AnkiWeb, I think it’s not possible due to the browser’s autoplay blocking policy.
About AnkiDroid, it should behave the same way as the desktop version, check the deck’s options - it’s accessible from the context menu (with a long tap) or from the overview screen.
https://docs.ankidroid.org/#deckOverview
By default, Anki automatically plays audio on the front and back of cards. If you check “Don’t play audio automatically”, Anki will not play audio …
https://docs.ankiweb.net/deck-options.html#audio
Maybe also install the latest AnkiDroid version from GitHub (if you’re on 2.15.6 from Google Play that was last updated on Jul 14, 2021).