Official Pebble support for your Pebble smartwatch ended on June 30, 2018
The app store closed, the voice recognition broke, and mobile app updates and a lot more features are things of the past.

If you still want to use your Pebble and enjoy many of the features that are now missing, you can.
No need to throw it in a drawer, never to be thought of again.
Rebble is an unofficial spinoff of the Pebble platform.

This new version of the Pebble App was provided by Google on October 24th, 2022. It provides compatibility with the Pixel 7 and Pixel 7 Pro, and improves the reliability of Caller ID.
Since Google has removed the official application from the Play Store, you must install it manually from the Rebble server. After you tap on the link, it will open your default browser, and asks for download the apk file. You have to accept everything, and download, and install the Pebble app. Maybe Install is blocked on your device from unknown sources. In this case you need to allow it in Settings. You may have to restart the download process after you enabled the unknown sources.

That means continued mobile app support, an operating application store, and firmware updates.
Everything you need to keep your Pebble in good working order.

UPDATE!!! Google has updated the application you downloaded in Step 1, so the Caller ID should be fine now.
Unfortunately there is an API changes in Android 9 Pie, which is not compatible with the Official (old) Pebble app, and the name is not displayed at the call. The only solution is to use third party dialer app. I recommend installing the above application (Dialer for Rebble), I've been using it for a long time.