Observation Details
On base viewport size of 320×256px and page zoom of 100%, the available vertical space in certain dialog windows is extremely limited, due to fixed top and bottom bars. Depending on the bars' content, available vertical space is <100px.
Remediation Notes
While this is not strictly considered a failure for criterion 1.4.10 on its own, the limited vertical space in the dialog window makes navigating the dialog's contents extremely difficult. Evaluation of the need for the fixed top bar and the large fixed bottom bar should be done.
Consistency with other dialog windows could remove the (empty) top bar and/or add the close button to a fixed position of the scrollable dialog window.
The fixed bottom bar could e.g. be shrunken by
decreasing margins and/or paddings,
decreasing the size of the primary button,
changing the layout to display price information and primary button side-by-side.