Qf8 on last move was even easier for white- because they could win pawn f7 with check if black king moved to d7 or c7, in other way if black defence from check with Qe8, then white could exchange queens and had easy winning in pawn ending. Instead of this white won pawn f7 without check and black could win e4 pawn by moves Qb1+ and Qe4. But this ending is also easy to win
Kaspi had no problems in this ending.
All
Qf8 on last move was even easier for white- because they could win pawn f7 with check if black king moved to d7 or c7, in other way if black defence from check with Qe8, then white could exchange queens and had easy winning in pawn ending. Instead of this white won pawn f7 without check and black could win e4 pawn by moves Qb1+ and Qe4. But this ending is also easy to win