Menos 4.5 goles
Shamrock Rovers have shown strong defensive capabilities, particularly in their recent matches, with a tendency to keep games low-scoring. They conceded only 4 goals in their last 5 matches in the Conference League.
There have been under 3.5 total goals scored in 12 of the last 13 Shamrock Rovers matches. This trend suggests that their games typically maintain a lower scoring range.
Although Chelsea has scored multiple goals in several matches, they have still kept their scoring under control, not exceeding 4 goals in 6 of their last 7 UEFA Europa Conference League games.
Also I think that Shamrock will not be able to score.