A chromosomal male is XY and a chromosomal female is XX. Now imagine if, one day, this world has only males - is it possible to "recreate" a female by using two X chromosomes from two different males?
Technologically yes, but practically no, because there would be no surrogate mother available to bring the artificial XX zygote to term.
Theoretically a cell with two male Xs can be generated, given that it is technically possible to shuttle single chromosomes between cells (Paulis, 2011).
However, assuming that in your future world oocytes are available from oocyte banks and sperm from sperm banks just like they are today, then the artificial combination of two Xs from male cells wouldn't be necessary in the first place, as regular IVF could be used.
Note that in both the chromosome transfer and IVF scenario, a female would still be necessary to implant the zygote. Until artificial wombs become available (they are not), it is impossible to generate females without females.
- Paulis, Methods Mol Biol (2011); 738: 57-67