LF 60% with mode toggle

Hi! I'm relatively new to mechanical keyboards and I need some help.

I need a 60% that will allow to toggle between two mode, one for writing and one for cursor movement with arrows (possibly on IJKL).

From what I found most of the 60% use the Fn button for arrows, but you have to keep it pressed, which will not work for me... I need to actually toggle the alternative layout. Some 60% have a "Fn lock" to support this, but it's hard to tell by just looking at their specs...

Do you know any model with a similar feature?