Turkish
Airlineroute reporting that Turkish will use the 7M9 from late May and indeed booking engines showing an all MAX operation most days - the morning is a 7M8 and afternoon the 7M9.
Obviously this summer sees the restoration of double daily and probably a seat increase as the 7M9 offers up to 169 seats although last summer did see several 739;s with the same capacity but the schedule was only 12 a week.
Ryanair loading winter 2019/20 with the only possible surprise is that Porto is bookable for most of the winter. It has operated in winter before and had moderate loads and allegedly rubbish yields and vanished completely for a few years. Of the few flights bookable the frequencies are the same as this winter although Verona showing just weekly.
Pete