"The Ukrainian Air Force is using iPads, or similar tablets in the cockpits of its Soviet-era jets to enable rapid integration of modern Western air-to-ground weapons"

TWZ:

The fact that the size of the tablet, attached horizontally, blocks out key instruments in the cockpit suggests that it displays a variety of flight-critical data, as well as being used for navigation.

...

it seems that the same tablet is also vital for the employment of several Western-supplied air-to-ground weapons

...

its Soviet-era fighters lack the kinds of data bus interfaces that would ensure seamless compatibility with any of these three weapons.

This is something we have discussed in the past and we also concluded that a tablet was a likely part of the solution.