Hi!
If I don't break the roundabout, the bus routes that run there will go around the entire roundabout and this is very confusing when looking at the map. In the link below, OSM writes that it is not forbidden to break up roundabouts.
https://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout#cite_ref-1
"The roundabout itself
Shape: Most editors have a tool to create a circle. (see below)As usual with all roads: split the roundabout as necessary for tagging different properties or route relations or other relations.Note that route relation such as bus relations are added sometimes with entire roundabout without splitting it, that is also fine but splitting it is also fine and there is no consensus which is preferable[1]"

There is a similar opinion on this forum:
https://community.openstreetmap.org/t/mapping-q-relation-which-uses-part-of-roundabout/48282

The Hungarian Openstreetmap Wiki specifically states that the roundabout must be broken if a connection only uses part of the roundabout.
https://wiki.openstreetmap.org/wiki/Hungary/T%C3%B6megk%C3%B6zleked%C3%A9s
 "A tömegközlekedés folyamatát jellemzi.

Kapcsolatot hozunk létre az egyes viszonylatokhoz külön-külön, amely összefogja a viszonylat irányainak kapcsolatait (lásd alább).
Kapcsolatot hozunk létre a viszonylatok irányaihoz külön-külön, amely sorrendben tartalmazza azokat az útszakaszokat, amelyeken az adott járat keresztülhalad, majd ezután szintén sorrendben tartalmazza a járat megállóhelyeinek kapcsolatait, illetve ennek hiányában a megállási vagy hozzáférési pontjait.
Az útvonalnak folyamatosnak kell lennie. Ha az útvonal körforgalmon halad át, akkor azt meg kell törni."
(It characterizes the process of public transport.

We create a connection for each route separately, which brings together the connections of the directions of the route (see below).

We create a connection for the directions of the routes separately, which contains in order the road sections that the given route passes through, and then also contains in order the connections of the stops of the route, or in the absence of such, the stopping or access points.

The route must be continuous. If the route passes through a roundabout, it must be broken.)

That's why I will continue to break roundabouts if public transport or other connections require it.