Yes, they are for everybody. However, there are two different manifestations of tongues. One is for us all individually, yet does not require interpretation found in Mark 16:16-18 - not no interpretation listed. The other is actually performed in an office of the Church by those with that office. And it MUST be accompanied by interpretation of tongues by someone with the accompanying office. That is why in verse 1 Corinthians 12:30 is shows that not everyone has these offices of the Church for the profit of all.
Another difference between the two tongues is the direction. The individual tongues are TO God. And the office receives messages FROM God for the profit of all, and MUST be interpreted.
Unfortunately, they are not believed in by many people and that binds them in chains of unbelief to the point that the gift is there but not operational. Not unbelief in Christ, but in the gifts. So even though they may have the power of the Holy Spirit and are born again with a nature that hates sin, they miss out on
all that God has for them. But they are still saved. Another problem with this unbelief, it spreads to the other gifts, the best gifts. The main ones I operate in are the hearing gifts. I can hear God's voice and am able then to walk in the Spirit, and understand the spiritual interpretation of His Word.
cc:
@Tong2020