MacRumors published a story that Apple has released watchOS 7.3.1.

Apple Releases watchOS 7.3.1 With Fix for Apple Watch Series 5 and SE Charging Issue

Apple today released watchOS 7.3.1, a minor update to the watchOS 7 operating system that was released in September. watchOS 7.3.1 comes a couple of weeks after the release of watchOS 7.3. ‌‌The watchOS 7.3.1 update‌‌ can be downloaded for free through the dedicated Apple Watch app on the iPhone by going to General > Software Update. To install the new software, the Apple Watch needs to have at least 50 percent battery, it needs to be placed on a charger, and it needs to be in range of the ‌‌‌‌‌‌‌iPhone‌‌‌‌‌‌‌. 

Apple Releases watchOS 7.3.1 With Fix for Apple Watch Series 5 and SE Charging Issue