Vitiligo on left leg only. My leg only!

I have vitiligo on my left leg only and it is decreasing by medications and phototherapy , for the past 4 5 months I was not taking phototherapy and now some new patches are forming on my left leg . I am now consuming medicine applying tacrolimus ointment cream on white spots and taking sunlight but the black skin colour is not coming on white spots . When I was taking phototherapy they were coming . I don't have white hairs on my vitiligo prone areas and I'm 18 yrs old I have my whole life in front of me and I'm diagnosed with vitiligo. I think after taking the corona vaccine this skin disease happened to me . When I lived in Varanasi I was able to take phototherapy but now I live in very less  famous us place and I don't think here I could find phototherapy . Some respected doctor please suggest me what should I do . I have patches on my left leg only and I don't want them to spread on other parts and stop them within my leg only