Does software for Phone/PC exist that is a All In one reminders, calender ect. app that is synced with the PC and phone app, and is simple, intuitive, and clean looking.

I want to be able to set scheduled appointments and reminders to do stuff on the calender, on either my phone or PC, then it will show my schedule and send reminder notifications. The ability to link the same calender, schedule, and reminders between the phone and PC app is important to me and very preferred to have, but if an excellent and highly useful program exists that fits my needs and more, minus Phone/PC link, I will look into that as well. Offline use and sync when nearby due to being offline is also nice to have, but an extra. I mainly just want an app to put reminders and scheduled events and appointments, as well as things like shifts with times of the specific day and the ability to set a reminder that notifys you that your scheduled event is soon, or the ability to set one or multiple reminder notifications and alarms, (Very helpful), for scheduled events. Also if possible the Calender UI is clean, simple to understand and add/edit reminders or events, and preferably Dark Mode. The Laptop is an Acer Aspire Lite 16 with a i7-1355u and 16gb ddr5 Ram, and the phone is a Motorola Moto G05. If the ability to link the two apps to sync all calender dates and reminders ect is not available in an app, or the phone is incompatible, I would first prefer to be able to mainly use the app and desired features on my PC, possibly just having the reminders and alarms for scheduled events ringing and notifying on the phone, but if there is two different apps that sync as well that is fine. Let me know if you have any clarifying or other questions for me, and any kind of help is greatly appreciated.