Around 1 in 5 vaginoplasty surgeries lead to corrective surgery.
A systematic review  of neo-vagina surgeries found a re-operation rate of 21.7% for non-esthetic reasons.
A Brazilian paper  found a somewhat lower, but similar, reoperation rate of 16.8%.
 Dreher, P.C., Edwards, D., Hager, S., Dennis, M., Belkoff, A., Mora, J., Tarry, S. & Rumer, K.L. (2018). Complications of the neovagina in male-to-female transgender surgery: A systematic review and meta-analysis with discussion of management. Clin Anat. 31 (2):191-199. [Link]
 Moisés da Silva, G.V., Lobato, M.I.R., Silva, D.C., Schwarz, K., Fontanari, A.M.V., Costa, A.B., Tavares, P.M., Gorgen, A.R.H., Cabral, R.D. & Rosito, T.E. (2021). Male-to-Female Gender-Affirming Surgery: 20-Year Review of Technique and Surgical Results. Frontiers in Surgery 8. [Link]