Sources: 
+1 Iran has asserted that no nuclear negotiations are currently underway, as Foreign Ministry spokesperson Esmaeil Baqaei emphasized that their focus remains on ceasing hostilities rather than discussing nuclear details.
Despite submitting a peace proposal to the US, which includes a commitment to freeze uranium enrichment for 15 years, the negotiations seem to be stalled.
Reportedly, Iran's proposal outlines a three-step plan aiming to transition from a ceasefire to a comprehensive resolution of the war, including significant concessions on its nuclear program, although evidence suggests that discussions around reducing uranium enrichment have been complicated by a demand for security guarantees from the US.
The peace plan entails halting enrichment activities in its second phase, with limited resumption thereafter, involving a cap of 3.6 percent enrichment and the management of existing enriched uranium stocks.
While Baqaei has denied claims of suspension in enrichment, affirming, “
our plan is exclusively focused on ending the war,” sources indicate Iran may negotiate their nuclear activities. Meanwhile, relations remain tense, as US President Trump remarked on the Iranian proposal, noting it was unlikely to be accepted without firmer commitments.
The ongoing bilateral discussions highlight the complexities as each side interprets the others' intentions amid geopolitical tensions surrounding military presence near Iran.
References indicate that Iran expects to provide a formal response after evaluating the US's feedback on their proposal, which also includes a request for non-aggression guarantees and easing of sanctions.
Sources: 

Iran's Foreign Ministry announced there are currently no nuclear negotiations taking place as they review the US response to a proposal that includes a freeze on uranium enrichment. The proposal aims to transition from a ceasefire to ending the war with concessions on Iran’s nuclear program.