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NDS fail.
Looks like Ultegra so you'll have to ditch the rear mech and get ANY matching rear shifter and derailleur combo.
SRAM is cheap as chips and yeah Shimano compatible if your chain and cassette are not worn.
Either keep the front derailleur as a chain keeper or get some narrow-wide chainring and single ring chainring bolts to make the swap.
Honestly can't see why 1× unless you're going on trails/Enduro etc to prevent the chain from dropping on the chainring.
Chain and cassette wears much quicker, noisy drivetrain and yeah you'll replace chain and cassette much more often.
What's the transmission setup on this? Do you have a build thread?
I have a caad7 saeco i would love to convert in 1x10/11 flat bar and I cannot find the right mix of bits