When Suica service is "partially available in some other stations," how do I find out where exactly?

On this map describing the railway lines in Eastern Japan where Suica and other compatible IC cards can be used, it is noted that a star indicates that

In addition to the above, Suica's service is partially available in some other stations. For further details, please access the JR EAST website.

For example, the Ban'etsu West line, running westwards from Koriyama station (at the bottom right corner of the PDF), is marked with a star. I assume that this means that Suica can only be used at some stations on this line, but where exactly on the JR East website do I find out exactly what those stations are?

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Where can I charge Suica?

For Android The easiest way to charge your Mobile Suica is through Google Pay. Once Mobile Suica is installed on your phone, go to your Google Pay app and follow these steps. Once you have this set up, charging your Suica is as simple as tapping add money on Google Pay and using your existing cards.

Can you recharge Suica with credit card?

The Suica can be loaded up to a maximum of 20,000 yen at Automatic Ticket Vending Machines and Fare Adjustment Machines displaying the Suica mark. Only yen may be used to load a card. A credit card cannot be used to load a Suica.

How do I top up Suica online?

Top up your Suica or PASMO card

In the Wallet app, tap your Suica or PASMO card.

Tap the More button .

Tap Add Money.

Choose the amount that you want to add and tap Add.

Select the credit or prepaid card that you want to use to pay and confirm the transaction with Face ID or Touch ID.

How do I add Suica to my wallet?

How to add a new Suica or PASMO card on your iPhone or Apple Watch

To add a card: ...

Tap Transit Card.

Choose the card that you want to add.

Tap Continue.

Choose an amount to put on the card and tap Add.

Follow the steps on the screen to confirm your purchase and add your Suica or PASMO card.

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: The Lazy Artist Gallery, Designecologist, Andrea Piacquadio, Anna Tarazevich