I am doing bulk update attribute from admin side in magento2.
I am not getting message of 'attribute has been updated' something like as.
I am getting below message which is attached in screen shot .
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In 2.3 queues were added for product mass updates. You would need to run the consumer for
product_action_attribute.update for it to process the updates.
In your case it would be
bin/magento queue:consumers:start product_action_attribute.update, you could have multiple consumers running at the same time, but I guess one will do.