Looking over some of his stats:
His first few years in Tennessee were usual rookie TE low output numbers. Yeah 4 was the explosion. That year 4 (2020) roster had AJ Brown at WR, but the rest were Corey Davis, Adam Humphries, Nick Westbrook, etc. Nothing spectacular outside of Brown. Corey Davis had a career year (984 yds/5 TDs) and AJ Brown rocked (1,075 yds/11 TDs).
2020 in Tennessee was the career year for Jonnu Smith (448 yds/8 TDs).
TN in 2020 was the 3rd ranked Total Offense and the 23rd ranked Passing Offense.
2021 and 2022 were two duds in New England. (294 yds/1TD & 245yds /0 TD).
NE in 2021 was the 15th ranked Total Offense and 14th ranked Passing Offense.
NE in 2022 was the 26th ranked Total Offense and 20th ranked Passing Offense.
2023 in Atlanta saw a career high in REC Yards (582 yds/3 TDs).
Atlanta in 2023 was the 17th ranked Total Offense and the 22nd ranked Passing Offense.
Miami in 2023 was 1st in both categories.
Durham Smythe had 366 yds / 0 Tds last year.
In Miami, I could see Jonnu Smith bringing in 400 yds receiving. He has tremendous YAC for a TE, but I still don't see a whole lot more yards than Smythe just because Hill and Waddle gobble up so many. But where I think he would shine is those RZ TDs. His career year in Tennessee = them having the 3rd ranked Total Offense. They got the ball down near the RZ a lot. Even with AJ Brown in the mix snagging 11 TDs that year, Smith still brought down 8 of them himself. Not to mention Derrick Henry claiming 17 as well.
Jonnu Smith is 28. Older, little slower. But I think he would be a tremendous RZ option for Tua in this offense. A 6'3" 250 lb safety net that has shown in the right offense he can get you a lot of TDs at TE.