If they were all that combo none could have rose combs and many do... especially those from Hoovers, so they must use a different mix(RIR and SLW are also used by some)? ISAs however are usually from RIR/RIW)
July 1 2021 hatches. Friendly little dudes, just already have 2 adult roosters and not enough hens. Moms were Cackle Lavender and Black, dad was a Cackle Lavender. My broody sexlink hatched 4, we hatched 4 in an incubator. https://www.lsn.com/poultry/blue--lav-ameraucana-roosters/6678347.html
They both are red sexlinks yes, but from a different hen/roo pairing. Queens typically have darker feathers like black in some areas including the tail(some may also have rose combs but not all). ISA however will be brown/red and white, no black and will have single combs only.
Ameraucanas will always have beards/muffs, dark legs and a pea comb. They also only come in 9 colors, none of those weird EE patterns you see(though colors can vary if you breed one color to another). This site is helpful and has descriptors and photos...
if a true ameraucana (not EE or Americana) you have a better chance of this if the sexes were reversed...blue egg male with brown egg female...will always be olive laying chicks
I say hatch 2x as many as you want...some wont be fertilized, some just wont take and some that do quit for no apparent reason. I started with 17(I found a crack in one upon arrival) with 5 under broody, the rest in the incubator.
Near Cookeville TN....I had never hatched either but we did hatch 4 of these, broody hatched other 4, and let her raise them all. We did both just in case she didnt sit the whole time, never had a broody, wasnt sure how it would all work out.