I cannot restore on some dates that were configured for backup and the log indicates that the backup was successfully created

When I try to restore using the wizard, there are some dates in the calendar that appear in bold and others not, although in the dates that do not appear in bold it was configured to be backed up, and also the logs indicate that backups were made correctly, for example, 30 days in the month that backups should be made I can only select 3 or 4 dates, the other days it seems that the backups were not made, although in the logs it indicates that They were made succesfully.