This manuscript addressing the dynamics of fractal-fractional type modified SEIR model under Atangana-Baleanu Caputo (ABC) derivative of fractional order mathpzcy and fractal dimension mathpzcp for the available data in Pakistan . The proposed model has been investigated for qualitative analysis by applying the theory of non-linear functional analysis along with fixed point theory . The fractional Adams-bashforth iterative techniques have been applied for the numerical solution of the said model . The Ulam-Hyers (UH) stability techniques have been derived for the stability of the considered model . The simulation of all compartments has been drawn against the available data of covid-19 in Pakistan . The whole study of this manuscript illustrates that control of the effective transmission rate is necessary for stoping the transmission of the outbreak . This means that everyone in the society must change their behavior towards self-protection by keeping most of the precautionary measures sufficient for controlling covid-19.