F
Fekin
There are many nothched floats available,these are what you refer to as a trowels,trowels are usually small for pointing,flat edge or gauging for flat buckets or for making margins in concrete.
Time have changed though now as "your adhesive floats" are now called trowels, everywhere I look for them their always called trowels and never floats.
Only floats I see mentioned are grout floats, try a google search, every result on the first page for "tiling floats" only mention grout floats.
Or maybe you just been callin them the wrong name for 30 years, lol 😛