I cam across the guide post Move LND to new disk without closing channels containing this guide How to Migrate an Umbrel LND Node without Closing Channels -
following this guide, i am installing a fresh umbrel instance with my old one running.
install bitcoin on new node, stop all dockers and umbrel
rsync bitcoin blocks over
start umbrel make sure sycned
stop both umbrels
rsync over lnd and other app-data
starrt new nodes umbrel and dockers and if all goes well do not start old one… this is the basic idea for LND but should apply to everything