Looking closely at the images, the first thing I notice are the following points;

1. The images seem staged as in stock photography.
2. Beside the first image which is lit from the side, the rest seem to be backlit.
3. The natural light coming through is very soft; perhaps a cloudy overcast day.
4. All images seem exposed for the shadows which is what seems to be producing the low contrast soft look with the blow-out highlights.
5. The subjects also seem to be exposed with reflected light, maybe a reflector or a wall

All the above will definitely produce the results you have attached straight from the camera and I believe that’s what has taken place with regards to these images.

However, if you wanted to attempt to achieve something similar in Lightroom, you can try something as follows;

1. Contrast – Slide to the Left – create softness
2. Dehaze – Slide to the Right – Increase definition
3. Highlights – Slide to the Right – Blowout the Highlights
4. Shadows – Slide to the Right – Create further softness whilst increase exposure in the subjects
5. Black – Slide to the Left – again, will add to the overall softness
6. White – Slide to the Right – increase ambient white
7. Saturation – Yellow Decrease // Orange Increase – To me, there seems to be low levels of Yellow in the subjects and a slight increase in Orange.

Please note, these adjustments will work better to enhance any image that is already close to what you wish the end product to look like. If you have an image that is front-lit with a dark background, you will find it very difficult to create a natural looking back-lit effect.