I am also struggling to understand the point of the question. Perhaps this is what is being asked:
Is it O.K. to say the Anima Christi on my own, rather than participate in the singing (if this is happening) before and after I receive Communion?
My answer would be “no”.
From the 2002 General Instruction of the Roman Missal (GIRM) approved for the USA, which can be accessed from
romanrite.com/girm.html :
“The Importance of Singing
39. The Christian faithful who gather together as one to await the Lord’s coming are instructed by the Apostle Paul to sing together psalms, hymns, and spiritual songs (cf. Col 3:16). Singing is the sign of the heart’s joy (cf. Acts 2:46). Thus Saint Augustine says rightly, “Singing is for one who loves.”48 There is also the ancient proverb: “One who sings well prays twice.””
“86. While the priest is receiving the Sacrament, the Communion chant is begun. Its purpose is to express the communicants’ union in spirit by means of the unity of their voices, to show joy of heart, and to highlight more clearly the “communitarian” nature of the procession to receive Communion. The singing is continued for as long as the Sacrament is being administered to the faithful.74 If, however, there is to be a hymn after Communion, the Communion chant should be ended in a timely manner.”
“88. When the distribution of Communion is finished, as circumstances suggest, the priest and faithful spend some time praying privately. If desired, a psalm or other canticle of praise or a hymn may also be sung by the entire congregation.”
So if, in the circumstances, the priest decides after Communion to have singing, rather than silence and private prayer, then this decision should be respected.