Barcelona are trying to interfere Chelsea's deal to sign Raphinha now. They are rumoured to be ready to offer an amount like 70 million euros to sign him. However I wonder how they will be able to afford Raphinha and Lewandowski both at the same time. Because they will have to pay more than 100 million to sign them both. A team that are having financial issues shouldn't be able to spend this much money. Maybe they are relying on the Frenkie de Jong transfer to Manchester United from which they are likely to get 65 million fee directly.
It's not a problem for Barcelona to bring in Raphinha and Lewandowski, apart from their plans to sell de Jong to Manchester, reportedly they get €267 million from television rights. With this large funds, they were even able to bring in other players besides Raphinha and Lewandowski. moreover like you said they would get €65m selling de Jong. If Barcelona manage to sign Raphinha and Lewandowski, La Liga next season is likely to be even more interesting.
Barcelona have been trying hard to whiten their finances and one way they did it was by selling their television rights and for now it has been very effective.
I have no doubt that Barcelona will be able to buy both players at the same time, the issue of Lewandowski's transfer has not been realized because of the unsuitable agreement between Barcelona and Bayern.
Raphinha and Lewandowski are certainly high-quality players and are very likely to be able to help Barcelona improve their performance next season.
But after Barcelona made his offer, Raphinha immediately stated that he liked Barcelona, this factor became a strong supporter that Barcelona might get Raphinha. Because we know, not only Chelsea and Arsenal who have an interest in recruiting Raphinha, but there are still teams like Manchester United and Liverpool who are also monitoring. In the case of Lewandowski and Raphinha, Barcelona seems to benefit because players are more interested in joining Barcelona, this is certainly very profitable for Barcelona itself because there is already player interest in the club. Next, we just have to wait for Barcelona's efforts to make this transaction happen, because if Barcelona actually gets fresh funds from broadcasting rights, then of course this transaction will be completed soon.