Here you go again, promoting your ill informed personal opinions as fact, you are so disingenuous it’s untrue.
They don’t need to put signs in their shop with their own messaging on. The Supreme Court made that very clear. There is NO onus on them or requirement whatsoever to advertise or state what they will or won’t bake.
It was also found by The Supreme Court NOT to be discrimination of ANY form (not just your incorrect ‘illegal discrimination’ terminology). The Supreme Court ruling emphasised that the case was about the protection of freedoms of expression and conscience (Articles 9 & 10 of the ECHR) and was not a case of discrimination.
Finally, to address your last sentence (which is just pure made up guff)…
There is no new legislation being proposed or considered as a result of the Lee v Ashers Baking Company Ltd. case following the Supreme Court ruling. The ruling did not trigger a change in the Equality Act 2010 or relevant Northern Ireland legislation, as the court found the existing equality law does not compel service providers to to express a message with which they disagree. The subsequent ECHR ruling backed up The Supreme Court ruling and the case is concluded.