@chrisrg it worked out perfectly. Note2self: Thing to remember slot_a and slot_b.
One question though. Fastboot has several options, one of is:
–slot SLOT Use SLOT; ‘all’ for both slots, ‘other’ for
non-current slot (default: current active slot).
How to use this option is not clear or concise enough. Would you use it like and/or is this correct?
fastboot --slot ‘all’ flash boot recovery-e-1.6-s-20221201239247-dev-lemonadep.img
Can’t thank you enough!