Tap the account switcher in the top left corner and you should see the option.
See my comment for a screenshot. I don’t know why I can’t seem to post a screenshot in the body of post. Every time I try it gets removed.
Yes it is steep for me in Quebec with taxes it is 31 $ . But I had the option to use 20$ in google play credits from Google rewards. 11$ is an ok deal. Remember that sync is the first Lemmy app from former Reddit devs and that the developer worked really hard to release it.