Over the past few years, Nintendo Switch version's of Minecraft has degraded... Quite a lot. Chunks not loading for many seconds, Low Render Distance, Frequent Crashes, Poor Online Capability, Lag, and that's only a few.
Please optimize this version, it's obvious this port was made poorly. It's not like the Switch can't handle more demanding games than Minecraft.
Thank you for your report!
However, this issue is Invalid.
Simply stating that "My game is laggy" is not helpful for Mojang to diagnose your issue. If you can pinpoint a specific cause when lag happens for you, please open a new report for that specific issue. If you think this might be a hardware issue please contact Community Support as they might be able to help with your issue.
Keep in mind that Mojang is constantly optimizing the game and simply playing the game provides feedback to Mojang on which parts cause performance issues.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki