No, SCB = static channel backup. That means is just a snapshot of the state of your channels.
Umbrel is doing that SCB EVERY time a channel is open or closed. There’s NO NEED to do it after each transaction.
All transactions and statuses are recorded in channels.db file (that is huge) and is written in real time.
Please start reading LND documentation how these things work.
https://wiki.ion.radar.tech/tutorials/troubleshooting/static-channel-backups
Also here a full list of documentation to be read:
http://community.umbrel.com/t/important-links-to-learn-more-about-bitcoin-lightning-network/