I'm looking for a project management tool similar to gantt but... different

I'm wondering if this type of tool exists. Basically, I am senior dev of a 3 man dev team at a non-tech company. I maintain 60 or so web apps for our 300-400 users (all internal apps) as well as act as jack of all trades when it comes to SQL, IIS, self hosted and cloud hosted windows server boxes, VMware, etc. Basically, I have a lot of spinning plates.

We are in active development but we get interrupted a lot. Like, a lot a lot. Because of this, we don't really work based on deadlines but more on timelines. Upper management knows that things get priority over other things and we have to move things around and pivot a lot, so as long as we can explain why a project took 6 more months than we projected, it's fine.

So having said all that, I'm looking for a timeline system similar to gantt but I want the ability to have more than one "timespan" per task/row.

So for example let's say I'm building a to-do app and one of the tasks is to figure out the theme/color scheme of the app. I think this will take 3 days, and I don't really need to be more specific than that, they aren't trying to micro manage. However, I got interrupted and pulled off the project in the middle of that task, so I worked on it for 1 day, I had other things for 3 days, and I came back to finish the last two days.

In this case, in a gantt chart, your task can only be one "timespan" per "row" and in order for me to chart what actually happened, I need to add multiple subtasks to that task and the task ends up taking 3 rows of space.

This is rough to read and annoying to have to rearrange and insert new subtasks and rearrange subsequent tasks along the timeline.

Is there a tool out there that handles this more "ad-hoc" scheduling that I'm looking for?

Ideally what I would like is for me to be able to put together a full estimate of time for the project (say 3 months) with the ability to cascade schedule changes down when a task in the middle goes on longer than expected or gets interrupted.

I would like to have categories or color mapping so we can see which timespans are interruptions and which are tasks done and tasks to do.

Am I asking too much? Does gantt have this ability and I've not found the right vendor?

Right now my temporary solution is excel but it's a beating to have to go shift things every time I have an interruption, I feel like I spend more time explaining what happened than I do actually programming, haha

Edit: I've seen things like Monday.com and Microsoft project, but these are really heavy and too specific for my needs, I don't want a lot of context or setting up a kanban board or anything like that, I just want effectively an interactive timeline with simple "I'm doing this for x days" and not much else in terms of percent complete, details of the task, sprint integration, etc.

Think trello in complexity, just time-based and sideways 😅

I don't want to be a project manager, I don't have time for that - I just need the ability to quickly track interruptions and be able to use it as backup if upper management comes poking around