Yes it does not matter if the lavender is the cock/cockerel or the hen/pullet. Both can have zero, one, or two copies of lav since it is not sexlinked like barring or gold/silver
There’s an old adage “start where you are with what you’ve got” so if you have a male with leakage and for whatever reason don’t want to cull him or find another one, the best course to correct it in your line would be to breed to black or even lavender without any leakage. Then cull heavy from...