MS representation of our sample. Every object is placed according to its R_FeII and FWHM(Hβ). Greater metallicity, Z, is expressed with increasing marker sizes and different colors. Objects with subsolar metallicity are marked in red, objects with 1 Z_⊙ ≤ Z ≤ 2 Z_⊙ in orange, objects with 2 Z_⊙ < Z ≤ 10 Z_⊙ in gold, objects with 10 Z_⊙ < Z ≤ 50 Z_⊙ in blue, and objects with metallicity greater than 50 Z_⊙ in indigo. Sources from this work are shown in circles. Squares are used as reference values for the objects in S21, G22, and M23, the latter with two squares, one for RL sources and the other for RQ sources. The gray region describes the typical positions occupied by objects along the MS (Zamfir et al. 2010; Garnica et al. 2022).