Answer: No. Samsung Galaxy A54 5G Case do not fit the Galaxy A55 5G.
Samsung Galaxy A54 5G Size: 158.2 x 76.7 x 8.2 mm
Samsung Galaxy A55 5G Size: 159.9 x 75.1 x 8.4 mm

The Samsung A55 5G will feature a 6.5-inch Infinity-O Super AMOLED display with an aspect ratio of 20:9 and a resolution of 1080 x 2400 pixels. It may also offer IP68 waterproof rating.
Galasxy A55 is expected to be powered by Exynos 980 processor with 5G modem. It will come with 6GB RAM and 128GB internal storage, which you can expand up to 512GB via microSD card. The device is likely to run the latest Android 10 operating system with Samsung One UI 2.0 skin.
The camera setup on the Samsung A55 5G is likely to be the same as its predecessor, the Samsung Galaxy A54 5G. This means it could have a triple rear camera setup with a 50 MP primary sensor, a 12 MP secondary sensor, and a 5MP depth lens for portrait shots. It may come with a 32 MP or higher front-facing camera for selfies, depending on the market.
Galasxy A55 5G will be equipped with a 5,000mAh battery and support 25W fast charging. It can come with WiFi 6, Bluetooth 5.0, GPS, and a USB Type-C port for connectivity. Additionally, the device may feature an in-display fingerprint scanner for enhanced security.
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