In general, if you purchase equipment from outside of your country that comes with wall transformers (the kind that directly plug into the wall and produce either DC or AC low-voltage output), you first look at the input voltage parameters. If the range is something like 100–240 V AC and AC frequency is 50–60 Hz, all you need is a plug adapter.
If the adapter requires 120 V AC @ 60 Hz, you look at the output voltage parameters: voltage, max. current sourced, whether it outputs AC or DC and what type of plug it has on the low-voltage side. Then you purchase a corresponding wall transformer for your country that matches your power outlet, AC or DC, the exact voltage, can source at least as much current as the factory-supplied power adapter and has the right kind of low-voltage plug.
There are countless (mostly Taiwanese and Chinese) companies that make such adapters. Your country should have electronics distributors that let you pick from a large selection.
Once the output is a) 24vac and b) at least 1A, it will work perfectly.
It looks like most garden irrigation solenoids work off 24vac, so there will always be transformers available from those type of sellers,
Of course, the best thing with the Rachio is that it can now be configured for your country, and can therefore work with the local weather, and it will work perfectly on Flex Daily if you want to use that