The most effective approach is usually to remove satellite trails during stacking rather than retouching them later.

A common method is sigma rejection/sigma clipping. This statistical stacking method rejects pixels that differ too much from the normal value across the image set, which makes it well suited to transient artifacts like satellite streaks. If you have enough light frames, it can greatly reduce or eliminate trails automatically.

In Sequator, try the select best pixels option, which can help reduce satellite interference. In general, any stacking mode that rejects outlier pixels is preferable to manual healing, because it is less likely to erase real stars.

If possible, capture more subframes. Rejection-based stacking works best when the satellite trail appears in only a minority of frames. If too many frames contain the same trail position, removal becomes harder.

For post-processing, manual retouching should be a last resort. If you must do it, work carefully and locally so you do not remove nearby stars.