Along with re-hydrating the roots of a bare root plant, it is important to recognize that most of the root mass needed to support top growth is missing ...
The rose has to grow new anchor roots ... the ones you received are not sufficient to perform the purpose of pumping up moisture from the lower levels of the soil ... and it has to grow feeder roots. Roses grow their roots first and then
put plant energy into top growth.
I hope you did a perk test for your planting hole before you planted your roses. (Drainage may be different in various parts of your garden.) If you have good drainage, it is impossible to over water a rose. So, with your new roses, since the root mass is inefficient, you need to water your roses daily. The roots that are there need that water ...
It may look like your rose is just sitting there and doing nothing, but the plant is doing first things first. It's growing roots.
When you do see new top growth, you know that the rose plant now has a working root system and can support new top growth and you can back off of the daily watering.
Note: the need to grow new roots when a rose is first planted is true for container roses, too. There is no way you can plant the rose without damaging the roots.