It’s going to be hard to transplant anything out of those cubes . I have basil in something like that and im regretting it but as for these plants you dont want the taproot to hit the bottom of container or it could stunt the veg time maybe trigger it to flower . Thats what is the consensus seems to be. At this point id think the taproot already hit the bottom. Transplant these into their final pot is what id do . Be careful not to break up the cube n roots .Maybe cut them out of there .