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You are right this has come up a a few times before.
The ability to automatically refresh Tableau Server views in a browser at regular intervals, is not currently built into the product.
To voice your support for the inclusion of this feature in a future product release, add your vote to the following Community Idea:
A possible workaround is documented in the knowledge base article below.
Automatically Refresh Tableau Server Views in a Browser at Regular Intervals
There are a few other ways this can be achieved perhaps using browser extensions to program an auto refresh and a community thread gives a few other possible options
Hope some of these help.