When mounting a TV on steel studs, Buildex 12-14 x 50mm Climaseal Hex Head Tek Screws are a great choice for strong and secure mounting.
If you have trouble locating the metal studs or they don't align with your bracket, consider using plasterboard fixings like . Each anchor can hold up to 20kg, and four anchors would easily support a small TV.
Another option is to mount a timber panel across the studs. This spreads the weight more evenly. Though it may seem tricky, the process is similar to mounting the TV bracket itself: measure, drill, and secure the screws. A timber panel also lets you use at least three studs for added support, which is important given the weight of larger televisions.
To begin, use a stud finder to locate your steel studs and mark the positions. Measure the distance between them and choose a timber panel wide enough to span at least three studs. A could work well. For extra security, use , placing at least three per stud. - MitchellMc