Yes, most definitely! There are many options for the Apple Watch, from a standalone cellular model that lets you leave your phone behind while you work out to a WiFi-only model that gives you access to Apples vast app ecosystem.
The Watch Series 6 features Apples S6 chipset, while the Series SE uses the S5 chipset. Although the Watch SE is not as advanced as the Series 6, Apple claims the SE is twice as fast as the Series 3. There is one major feature unique to the Watch Series 6: blood oxygen sensors.
When your Apple Watch is connected to Wi-Fi or cellular service, it is able to perform many functions, even if your iPhone is not present. Siri is available to help you with directions or to send messages. Send and receive messages. Make and answer phone calls.
Your Apple Watchs Messages app allows you to compose and send messages containing text, images, emojis, Emoji stickers, and audio clips.