Oh. Yeah that is normal. In fact before the an update you always had to change modes manually. Hmm.. I wonder if this should be considered a bug or not, given that you have zero armies it would make sense to start in the attack mode.
Under the Turn number there are 3 'modes' in addition to the commit mode. You can click on them to change.
Inspect : Let's you click on the map and see where stuff connects.
Deploy : Let's you deploy armies. When you finish deploying, it changes to attack
. Hence you might not have noticed before.
Attack : Let's you attack.
Note that there are hotkeys here btw. Q to change to the left, A to change to the right and Z to commit.
New player experience is quite important and I do see why that was confusing. If you want you can report it as a bug here and tell Fizzer (the dev) about your experience. https://www.warzone.com/ReportBug
Edited 2/12/2020 11:28:12